Chrissy Teigen Wishes John Legend Happy Birthday, Jokingly Reveals Possible Baby Names

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Chrissy Teigen and John Legend are totally #relationshipgoals.

As Legend celebrated his 37th birthday on Monday, Teigen took to Instagram to share a sweet message to her husband and baby-daddy –to-be.

WATCH: Chrissy Teigen Gets Emotional Over 'Lifetime Dream' Christmas Gift From John Legend

“Another year with you has flown by and I am so proud of what you've accomplished,” the 30-year-old supermodel wrote. “Every year, I wonder how things can even get better but you always find a way. Happy *37th* birthday to the most wonderful, hard-working, loving being I, and anyone who has ever met you, have ever known. We love you, my handsome old man.”

“Also I'm sorry I thought you were 37 all year,” she added.

2015 has been a fabulous year for the couple, who announced on Dec. 23 that they are expecting a baby girl.

Although no names for the baby have been revealed yet, Teigen did joke about it when one of her Twitter followers asked.

"Chubz,” she responded. (Please never change Chrissy!)

As the countdown to baby continues, Teigen has been honest and hilarious about her changing pregnancy body.

“Well well well, it's almost like my new skin tag heard me making fun of the skin tag commercial I saw last week,” she tweeted Sunday.

The Lip Sync Battle co-host showed off her growing baby bump on Instagram Sunday, donning an adorable one-piece bathing suit and captioning the pic, “Not vogue Thailand.”

WATCH: Chrissy Teigen Celebrates 30th Birthday With John Legend at Comedy Cellar

The caption was a nod to the cover she landed with Vogue Thailand, an international edition of the magazine.

To see the post along with some photos from her Vogue Thailand shoot, watch the video below.