Keith Urban and Nicole Kidman are all sorts of adorable, and Kidman's birthday message to her husband only continues to prove this fact.

Urban turned 50 on Oct. 26 and his actress wife penned a simple, yet beautiful birthday message on Facebook to honor the special occasion. "Happy birthday to my husband, best friend, lover, baby daddy and the greatest man in the world," she wrote, adding a black-and white photo of the couple holding hands with Urban gently resting his nose on her forehead. "We are so lucky that you are ours. Love you from Nicole Mary, Sunday Rose & Faith Margaret xx."

The superstar couple show their support for each other at every opportunity they get, and are not afraid to show off their love, especially on the red carpet. Recently, they were turning heads at the 2017 Emmy Awards and at the Cannes Film Festival earlier this year, showing off their affection while strolling down the carpet.

Kidman was also by the singer's side at the 2017 CMT Artists of the Year ceremony where he took the stage with fellow country stars Jason AldeanChris Stapleton and Little Big Town to perform an inspiring rendition of "I Won't Back Down" following the tragedy in Las Vegas.

Urban is up for five CMA Awards, scoring nods in the categories of Entertainer, Male Vocalist, Song, Single and Music Video of the Year. We'll find out who wins when the awards ceremony airs live from Nashville's Bridgestone Arena on Wednesday (Nov. 8).

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