Katherine Heigl Jumps in Pool at Actor Pals' Wedding

Credit: Jordan Strauss/Getty Images; Bryan Bedder/Getty Images

Release the doves!

Perfect Couples star David Walton married actress Majandra Delfino (of cult TV show Roswell) in Miami, Fl. on March 19, his rep confirmed to UsMagazine.com.

As about 200 guests looked on, Walton, 32, and Delfino, 30, exchanged their "I do's" at Trinity Cathedral; after the ceremony, the party moved to the members-only Surf Club for a reception, dinner and poolside after party.

Among Delfino's bridesmaids: Katherine Heigl, a fellow Roswell alum. A source tells Us the former Grey's Anatomy star, 32, gave a funny speech-- and even jumped in the pool at the after party! Heigl's hubby Josh Kelley and actress Ali Larter were also guests. 

The unfussy celebrating didn't end there: in lieu of the traditional champagne toast, wedding guests did a shot of tequila to cheer the newlyweds; the revelry lasted until around 4:00 a.m.