Rocker Steven Tyler's daughter Chelsea is engaged to actor Jon Foster.

The Aerosmith frontman's 25-year-old daughter is set to wed her beau of two years, according to Tyler's older half-sister Mia, who took to Twitter.com to share the exciting news.

Mia wrote, "I'm beyond excited and proud to say that these two turkeys are gettin hitched. I love you two to the god damn moon!", and shared a photo of the happy couple wearing sunglasses, fake moustaches and a chicken-shaped hat.

Foster, who is the younger brother of 3:10 to Yuma star Ben Foster, was introduced to his bride-to-be in 2011 by mutual friend and another rockstar offspring, Zoe Kravitz.

The couple formed electronic soul duo badbad in 2013.