How to Crochet a Cat Alien Plush Toy: A Complete Amigurumi Pattern Guide
If you’ve ever looked at a stuffed animal and thought, “this needs more antennae and an otherworldly glow,” you’re in exactly the right place. The crochet cat alien plush toy is one of those amigurumi projects that manages to be both adorably familiar and delightfully strange at the same time. It combines the soft, round features of a classic cat plushie with whimsical sci-fi details — big glossy eyes, little antennae, maybe a swirl of cosmic color — to create something that feels genuinely one-of-a-kind.
Whether you’re a seasoned amigurumi maker looking for your next creative project or a crocheter who’s comfortable with the basics and ready to try something a little more imaginative, this guide walks you through everything you need to know: the materials, the techniques, the pattern itself, and tips for customizing your alien cat to make it truly your own.
Why Cat Alien Amigurumi?
Amigurumi, the Japanese art of crocheting small stuffed animals and creatures, has exploded in popularity over the last decade for a very good reason — the finished toys are irresistible. They have that perfect combination of handmade charm and playful personality that you simply can’t buy in a store. And while classic animal patterns like bears, bunnies, and cats are always beloved, there’s something especially satisfying about putting a creative spin on a familiar shape.
The cat alien concept works so well because cats already have an otherworldly quality. Their vertical pupils, their silent judgments, their complete indifference to your feelings — it’s easy to imagine they might be receiving transmissions from another dimension. Leaning into that idea with antennae, large expressive eyes, and unconventional color choices makes for a toy that’s both funny and genuinely charming.
These plush toys also make wonderful gifts. They’re unique enough to feel thoughtful and special, soft enough to be genuinely cuddly, and small enough to be practical. They work for kids, for adults who love quirky décor, for space enthusiasts, for cat lovers, and for anyone who appreciates handmade art. A cat alien amigurumi is the kind of thing people see and immediately say, “I need that.”
Materials You’ll Need
Before you pick up your hook, gather everything you’ll need for this project. Having your materials ready before you start makes the process much smoother.
Yarn: You’ll want a smooth, lightweight yarn for this project, ideally worsted weight (category 4) or sport weight (category 3). Amigurumi stitches are tight, and a smooth yarn helps the texture stay clean and neat. For the cat alien aesthetic, consider colors outside the typical tabby range — think deep teal, lavender, dusty rose, mint green, or even a gradient yarn that shifts from one cosmic color to another. You’ll need a main color for the body and head, a contrasting color or two for details like the inner ears and belly, and a small amount of a metallic or sparkle yarn if you want to give your alien an extraterrestrial shimmer.
Crochet hook: A 3.5mm or 4mm hook works well with worsted weight yarn. The goal is to crochet tightly enough that the stuffing won’t show through the stitches, so don’t be afraid to go down a hook size from what the yarn label recommends.
Safety eyes: For amigurumi, safety eyes are a popular choice because they give the toy a professional, polished look. For a cat alien, consider larger safety eyes than you might use for a standard cat — 12mm or 14mm gives that big-eyed extraterrestrial quality. Black safety eyes are classic, but you can also find safety eyes in amber, green, or even holographic styles that look wonderfully alien.
Polyfill stuffing: Standard polyester fiberfill works perfectly. Stuff firmly but not so tightly that the seams pull and distort the shape.
Stitch markers: These are essential for amigurumi, where you crochet in continuous rounds and need to track the beginning of each round.
Tapestry needle: You’ll use this for weaving in ends and sewing pieces together.
Wire (optional): If you want your cat alien’s antennae to be poseable, a small length of floral wire or craft wire inserted into the antenna pieces before sewing them on adds a fun functional detail.
Embroidery floss: For the face details — the tiny nose, the whisker lines, and any markings you want to add — a few colors of embroidery floss give you precise control.
Gauge and Sizing
With a 4mm hook and worsted weight yarn, this pattern produces a finished toy approximately 5 to 6 inches tall when sitting. If you’d like a larger toy, you can use bulky yarn with a larger hook, or simply repeat some rounds to add height. For a smaller, pocket-sized version, try fingering weight yarn with a 2.5mm hook.
Gauge matters less in amigurumi than in garment knitting, but consistency matters a lot. Try to keep your tension even throughout so the pieces come out smooth and symmetrical.
Pattern Abbreviations
This pattern uses standard US crochet terminology.
MR = magic ring
sc = single crochet
inc = increase (2 sc in the same stitch)
dec = invisible decrease (insert hook through front loop of next stitch and front loop of stitch after that, draw up a loop, yarn over and pull through both loops)
sl st = slip stitch
ch = chain
BLO = back loop only
( ) x = repeat the instructions inside the parentheses the indicated number of times
The Pattern
Head
The head is worked in continuous rounds, starting with a magic ring.
Round 1: 6 sc in MR (6)
Round 2: inc in each st around (12)
Round 3: (sc 1, inc) x6 (18)
Round 4: (sc 2, inc) x6 (24)
Round 5: (sc 3, inc) x6 (30)
Round 6: (sc 4, inc) x6 (36)
Round 7: (sc 5, inc) x6 (42)
Rounds 8–14: sc in each st around (42) — 7 rounds even
Round 15: (sc 5, dec) x6 (36)
This is the point where you’ll insert your safety eyes. Place them between rounds 9 and 10, with approximately 10 to 12 stitches between them. The wider spacing gives your alien cat that slightly surprised, wide-eyed look that suits the character perfectly. Secure the backs of the safety eyes firmly.
Round 16: (sc 4, dec) x6 (30)
Round 17: (sc 3, dec) x6 (24)
Begin stuffing the head firmly now. Continue stuffing as you close.
Round 18: (sc 2, dec) x6 (18)
Round 19: (sc 1, dec) x6 (12)
Round 20: dec x6 (6)
Fasten off, leaving a long tail. Use the tapestry needle to close the remaining 6 stitches and weave in the end.
Body
Round 1: 6 sc in MR (6)
Round 2: inc in each st around (12)
Round 3: (sc 1, inc) x6 (18)
Round 4: (sc 2, inc) x6 (24)
Round 5: (sc 3, inc) x6 (30)
Round 6: (sc 4, inc) x6 (36)
Rounds 7–10: sc in each st around (36) — 4 rounds even
Round 11: (sc 4, dec) x6 (30)
Rounds 12–13: sc in each st around (30)
Round 14: (sc 3, dec) x6 (24)
Rounds 15–16: sc in each st around (24)
Round 17: (sc 2, dec) x6 (18)
Stuff the body firmly before closing.
Round 18: (sc 1, dec) x6 (12)
Round 19: dec x6 (6)
Fasten off and close remaining stitches.
Ears (Make 2)
Round 1: 6 sc in MR (6)
Round 2: inc in each st around (12)
Round 3: (sc 1, inc) x6 (18)
Round 4: (sc 2, inc) x6 (24)
Round 5: sc in each st around (24)
Round 6: (sc 2, dec) x6 (18)
Round 7: (sc 1, dec) x6 (12)
Do not stuff the ears. Flatten the opening and sc across to close (6 stitches). Fasten off, leaving a long tail for sewing.
For the inner ear detail, use your contrasting color or embroidery floss to stitch a small triangle shape on the front of the ear.
Arms (Make 2)
Round 1: 6 sc in MR (6)
Round 2: inc in each st around (12)
Rounds 3–4: sc in each st around (12)
Round 5: (sc 2, dec) x3 (9)
Rounds 6–10: sc in each st around (9)
Lightly stuff the bottom half (the paw end) but leave the top portion unstuffed so the arm stays floppy and poseable. Flatten and close with 4–5 sc across. Fasten off with a long tail.
Legs (Make 2)
Round 1: 6 sc in MR (6)
Round 2: inc in each st around (12)
Round 3: (sc 1, inc) x6 (18)
Round 4: BLO sc in each st around (18) — this creates the flat edge of the paw
Round 5: (sc 1, dec) x6 (12)
Rounds 6–9: sc in each st around (12)
Stuff firmly. Flatten and close. Fasten off with a long tail.
Tail
Round 1: 6 sc in MR (6)
Rounds 2–14: sc in each st around (6)
You can make the tail longer or shorter depending on your preference. Some makers like to slightly stuff the tail for structure; others leave it flat and floppy. Fasten off with a long tail for sewing.
Antennae (Make 2)
The antennae are one of the details that really sell the cat alien aesthetic. They’re essentially small tubes with a ball at the end.
Ball: Round 1: 6 sc in MR. Round 2: inc in each st around (12). Round 3: sc around (12). Round 4: dec x6 (6). Stuff lightly, fasten off, close. Leave a long tail.
Stalk: Chain 10, sl st in second chain from hook and in each chain across (9 sl sts). Fasten off.
Sew the ball to the top of the stalk, then sew the base of the stalk to the top of the head, just behind the ears. If you’re using wire, insert it through the stalk before attaching the ball, bend a small loop in the top to anchor the ball, and bury the bottom end inside the head when sewing it on.
Assembly
Assembly is where your alien cat really comes to life. Lay all the pieces out before you begin sewing so you can plan the placement.
Sew the ears to the top of the head, angled slightly outward and toward the front. Position the antennae between the ears, slightly toward the center of the head. Pin them in place before sewing to make sure you’re happy with the look.
Attach the head to the body by sewing around the neck opening, making sure the face points forward. Pin this as well — it’s easy to accidentally attach the head slightly off-center, and catching it before you’ve sewn halfway around saves a lot of frustration.
Sew the arms to the sides of the body, roughly at the level of rounds 10 to 12 from the bottom. Position them so they angle slightly forward, which gives the toy a natural, relaxed pose.
Sew the legs to the bottom of the body, on either side, so the toy can sit upright. Test the sitting position before you finish sewing to make sure it’s balanced.
Finally, attach the tail to the back lower portion of the body.
Adding the Face
The face is where your alien cat’s personality really emerges. With the safety eyes already installed, focus on the nose and any additional markings.
Use a small amount of pink or black embroidery floss to stitch a tiny triangle or upside-down Y for the nose, positioned just below center between the eyes. Add a subtle curve beneath the nose if you want a hint of a smile.
For whiskers, you can either stitch short horizontal lines in embroidery floss or skip them entirely for a cleaner, more alien look. Some makers add small dots of fabric paint for a more graphic effect.
Consider adding alien markings — small geometric shapes, dots, or swirl patterns stitched in metallic thread on the forehead or cheeks. These small details make each toy feel genuinely unique.
Customization Ideas
One of the most enjoyable parts of amigurumi is how infinitely customizable these patterns are. A few ideas to make your cat alien entirely your own:
A glow-in-the-dark element can be created by using glow-in-the-dark safety eyes or mixing in a small amount of glow yarn for the antennae and ear tips. A cosmic color scheme works beautifully — think deep navy body with rose gold ear lining and mint antennae. Some makers add a small crochet UFO or planet as an accessory. A tiny crocheted space suit vest adds humor and charm. If you’re making these as gifts, you can adjust the color scheme to match the recipient’s favorite colors or a specific character they love.
Care Instructions for Your Finished Toy
Crochet amigurumi toys should be hand washed in cool water with a gentle soap and laid flat to dry. Avoid wringing or machine washing, as this can distort the shape and damage safety eye attachments. If the toy is for a young child, check safety eye fastenings periodically and consider embroidering the eyes instead of using plastic components for toys intended for children under three years old.
Final Thoughts
The crochet cat alien amigurumi is the kind of project that reminds you why you fell in love with making things by hand in the first place. There’s something magical about watching a ball of yarn gradually transform into a tiny, personality-filled creature with big eyes and ridiculous little antennae. This pattern is flexible enough to adapt to your taste and skill level, detailed enough to keep you engaged from start to finish, and charming enough that whoever ends up with the finished toy — whether that’s you or someone you love — is going to treasure it.
So charge up your crafting corner, pick the most magnificently weird color combination you can imagine, and get started. The universe — and this tiny alien cat — is waiting for you.
