Chrissy Teigen is celebrating daughter Luna's first birthday.

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The 31-year-old model and "Lip Sync Battle" co-host shared an adorable family portrait with Luna and husband John Legend on the toddler's birthday Friday.

"Happy first birthday Lu!!!! My lovebug. You are all the best parts of the both of us and I cannot believe how much has happened in you first 12 months of life," she captioned the photo on Instagram.

"We love you to the luna and back," Teigen added. "Thank you @Yopeteryang for taking these awesome photos and the lip sync battle team for such a nice surprise!!!"

Teigen gave birth to Luna in 2016 after undergoing in vitro fertilization due to fertility issues. She discussed motherhood and confirmed plans for a second child in an interview with Refinery29 this week.

"I didn't really have any fears in having a kid, just because I knew that I wanted one and we worked so hard to have her," the star said. "For me, pregnancy was so great."

"I'm sure my next one is going to be the complete opposite of Luna. But everyone has their own experience," she mused.

"Luna is really the first baby I have ever been around. So you have to go through your own thing with it, and ... remember that it all changes the next week."

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Teigen married Legend, a 38-year-old singer, in 2013 after six years of dating.

She shared a video of Luna saying her first word during a family trip to Morocco in March..