The reality star announced her upcoming nuptials through a series of photos of the proposal posted on Instagram.
"Happiest moment of my LIFE I am marrying my best friend I woulnt choose anyone else I am so lucky and so grateful," she wrote with a photo showing Costa down on one knee handing her a ring.
Brooke's mom, Linda Hogan, and brother Nick Hogan, took to Twitter to offer the reality star their congratulations.
My Brooke is getting married !! Phil purposed to her last night !!! pic.twitter.com/biMOUiTofW— Linda Hogan (@LindaHogan) June 29, 2013