CaCee Cobb and Donald Faison

Donald Faison is engaged to CaCee Cobb.

The Scrubs star slyly tweeted a lyric from Beyonce's "Single Ladies" on Friday, writing, "If you like it then you better put a ring on it."

Cobb, Jessica Simpson's BFF and former assistant, replied, "If she likes it then she better say YES!"

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Simpson joined in on the fun Saturday, tweeting well wishes to the couple, along with a photo of Cobb's ring. Not to be outdone, Faison's former Scrubs co-star Zach Braff also tweeted: "Congrats to @donald_faison and @caceecobb on their engagement. Just wish I was there to run around you both with sparklers."

This will be Faison's second marriage and Cobb's first. Faison, 37, has three children with ex-wife Lisa Askey and a son from a previous relationship.

Cobb, 33, has appeared on both of Simpson's shows, Newlyweds and The Price of Beauty.