Chrissy Teigen offered an adorable birthday message on Instagram Monday to her husband, John Legend. In a cute twist, Teagen admitted that she thought he was a year older than his real age.

“Another year with you has flown by and I am so proud of what you’ve accomplished. 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,” she wrote alongside an image from a past photo shoot. “Also,” she added, “I’m sorry I thought you were 37 all year.”

Another year with you has flown by and I am so proud of what you've accomplished. 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.

A photo posted by chrissy teigen (@chrissyteigen) on Dec 28, 2015 at 6:59am PST

She later posted a video on Instagram, with the caption, “Happy Moroccan birthday my baby!!,” showing Legend jamming to some Moroccan version of Happy Birthday.

Happy Moroccan birthday my baby!!

A video posted by chrissy teigen (@chrissyteigen) on Dec 28, 2015 at 3:42pm PST

Legend’s 38th year on earth is likely to be unforgettable. He received an early birthday present with the news that Chrissy Teigen she is expecting their first child, which she announced in October.

Chrissy Teigen wishes John Legend happy birthday with the sweetest message: https://t.co/uZ48Cc59gE pic.twitter.com/31rZle6GRN

— Us Weekly (@usweekly) December 29, 2015

“John and I are so happy to announce that we are pregnant 🙂 As many of you know, we’ve been trying to have a baby for a while now. It hasn’t been easy, but we kept trying because we can’t wait to bring our first child into the world and grow our family,” she shared on Instagram.

John and I are so happy to announce that we are pregnant 🙂 As many of you know, we've been trying to have a baby for a while now. It hasn't been easy, but we kept trying because we can't wait to bring our first child into the world and grow our family. We're so excited that it's finally happening. Thank you for all your love and well wishes. I look forward to all the belly touching! Xx

A photo posted by chrissy teigen (@chrissyteigen) on Oct 12, 2015 at 4:55pm PDT

Over the weekend, Chrissy Teigen announced that they are expecting a baby girl. The expectant couple were married in 2013.