Hayden Panettiere Credit: MiamiPIXX/SBMF/FameFlynet Pictures

Hayden Panettiere may not feel comfortable rocking her engagement ring just yet, she she had no qualms about showing off her bangin' bikini body in Miami March 31! The Golden Globe-nominated Nashville actress flaunted her athletic figure in a hot pink swimsuit on Easter Sunday.

On March 30, Panettiere tweeted the first photo of herself with Wladimir Klitschko after Us Weekly broke the news of their engagement. Jumping in the air with singer-songwriter Erin McCarley, Panettierre joked that they were only half the size of her "Ukrainian giant" fiance.

Neither Panettiere, 23, nor Klitschko, 37, have publicly commented on their engagement. The couple split in May 2011 after a two-year courtship but quietly rekindled their romance in January 2013. Though they're keeping things hush-hush, the 5-foot-2 Heroes alum and 6-foot-6 boxing champion are eager to tie the knot. Reveals a source, "Looks like a summer wedding!"

In the meantime, Panettiere is enjoying some time off with McCarley and other gal pals, including musician Betsy Roo and singer Kate York. "Love my friends!" the actress tweeted March 30.