Kim Kardashian Sends a Sweet Birthday Message to Kanye West

— -- Kanye West turns 38 today and his wife couldn't be more excited.

Kim Kardashian took to social media to wish the rapper a happy birthday and share a sweet photo of him from childhood.

"Happy Birthday 2my best friend in the entire world! U R the most amazing husband &dad! U inspire me every single day," she tweeted. "You make all of your dreams reality & it's fascinating to be by your side & watching it all happen! You have a heart of gold!"

Kardashian, 34, and West have had a lot to celebrate recently. A few days ago, the reality TV star announced that they're expecting their second baby. (Their eldest, North, turns two next week.) And while Kardashian teased that her husband's birthday will be "major," this morning was more low-key for the famous couple.

"Not sure why Kanye & I are up so early but we're eating cereal & I'm showing him all of your sweet birthday messages!" Kardashian wrote on Twitter.