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JULIANNE AND DEREK HOUGH
Brother and sister Julianne and Derek Hough let someone new join in on their Christmas pajama fun. Brooks Lauch, Julianne's new hubby, also posed in a printed onesie.
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Jamie Foxx's onesie game was strong on Christmas. He wrote on Instagram, "MERRY CHRISTMAS!!! #lilblackelf! #blanta #godblesseveryone."
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TORI SPELLING AND FAMILY
Tori Spelling and hubby Dean McDermott gathered their five children for a festive family picture.
Wrote the star on Instagram, "One of my fave holiday traditions is wearing matching family PJ’s on Christmas Day. I think this year’s are my fave so far. And, it’s Baby Beau’s 1st Christmas."
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SHANNON BEADOR AND FAMILY
Real Housewives of Orange County star Shannon Beador and her three daughters showed off matching red tops.
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JESSICA ALBA AND FAMILY
Pregnant Jessica Alba and her family enjoyed their last christmas as four in matching red pajamas.
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SAVANNAH GUTHRIE AND FAMILY
The Today host and her children with husband Michael Feldman — Vale, 3, and Charley, 1 — went for red printed nightwear.
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NICK LACHEY AND SON
Nick Lachey and his Christmas Eve baby — Phoenix, born Dec. 24, 2016 — celebrated the holiday in coordinating ensembles.
"No merrier place to spend Christmas than with the most important people in my life! From our family to yours, Merry Christmas," wrote Lachey.
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JENNIFER LOPEZ AND AARON RODRIGUEZ
Everyone's favorite couple gathered together their respective families for the holidays.
Wrote Lopez on Instagram, "Hope everyone had a peaceful Christmas full of joy and laughter, surrounded by all of your loved ones... sending everyone lots of love and good wishes for this holiday season!!!! MERRY CHRISTMAS."
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STEPH AND AYESHA CURRY
"Merry Christmas from our family to yours! Enjoying family time and remembering that Jesus is the reason for the season. Blessings," wrote Ayesha Curry, who posed with her husband Steph and their two daughters.
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JOE AND JESSICA SIMPSON
"Got all dressed up for Christmas!!," the singer's father captioned this festive 2016 photo on Instagram. (Yes, Jess is wearing a candy cane onesie!)
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The Pretty Little Liars star posed in front of her Christmas tree in this cheeky holiday onesie.
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A makeup-free Lucy waited for Santa on Christmas Eve in these classic green-and-red elf pajamas.
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Ashley's still in the holiday spirit the day after Christmas, cozying up in her snowflake patterned holiday onesie with a warm, fuzzy hood.
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Oprah celebrated the morning after Christmas relaxing in her red-and-white striped onesie. "Happy morning after 🎄. Hot out of the oven jalapeño cheese bagels. 10 points WW .. worth it! #ilovebread," the star said on Instagram. Same O, same.
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The "All I Want For Christmas" singer says she was "getting in the Christmas spirit" on Instagram, posing in front of her tree in a revealing pajama look featuring a sparkly red bra, a draped plaid flannel and fuzzy booties.
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"The only time of year I wear matching pajamas," the star captioned this mirror selfie of her cute plaid set.
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KRISTEN BELL AND DAX SHEPARD
This married couple of three years knows a thing or two about coordinating outfits. Here they wear holiday-patterened hoodies to a Christmas party and prove they're serious #couplegoals.
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KEVIN HART AND FAMILY
The Hart family went matchy-matchy in their Santa hats and heart T-shirts, that even the dogs sported!
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GIULIANA RANCIC AND DUKE
Rancic and her son, Duke, 4, just couldn't wait until Christmas morning to throw on their reindeer onsies.
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SEAN LOWE AND CATHERINE GIUDICI
The Lowe family celebrates their first Christmas with baby son Sam in snowman onesies, a tradition they plan to keep every year, Giudici said on her Instagram.