Kings of Leon bassist Jared Followill is engaged to his girlfriend of five months, aspiring model Martha Patterson.

Followill, 25, popped the question at his home in Nashville, Tennesse, with a four-carat ring he designed himself.(We have to wonder - does it compare to the ring Brad Pitt created for Angelina Jolie?)

The musician excitedly tweeted, "It's true! I'm engaged! CANNOT wait to finally lose my virginity."

Followill previously dated "Twilight" star Ashely Green.

It's not the only good news in the Followill family.  In December his brother Caleb announced he and his Victoria's Secret model wife Lily Aldridge are expecting a baby.

Last August, the band canceled their entire U.S. tour after Caleb caused concerns about his alleged dependency on alcohol.