Joyeux Anniversaire, Jaimie! Peter Facinelli threw his girlfriend Jaimie Alexander a surprise party on Monday, March 10 to celebrate her thirtieth birthday, at El Floridita in Hollywood, where the couple and close pals danced the night away, multiple observers tell Us Weekly.
"Jaimie arrived with Peter and was so happy, she was definitely surprised," one eyewitness tells Us of Facinelli's big reveal. According to another pal, the couple and company partook in salsa dancing lessons with an instructor before hitting the floor to flaunt their new moves.
"Peter and Jaimie, of course, danced together -- and they were really good!" the onlooker exclaims. "The dancing didn't stop there," continues the eyewitness. "Peter, Jaimie and their whole party were dancing all night and looked like they were having a lot of fun."
According to another source, the Twilight hunk, 40, planned the party with the help of Alexander's friends. "Jaimie loves to dance so it was the perfect place," the source says. "All her friends were there. They surprised her with a birthday cake and Peter held her hand."
An infatuated Facinelli posted a cute photo from the bash on Tuesday in which his girlfriend blows out the sparkling candle atop her chocolate cake. "Jaimie seemed so happy all night while celebrating her birthday with Peter and her friends," the source explains.
Indeed, Alexander expressed her happiness on her actual birthday, March 12, by posting a photo with her beau from her surprise 3-0 bash. "Thank you @peterfacinelli for making my birthday (and everyday) so special," she wrote.
Facinelli and Alexander made their debut as a couple at the November 2012 premiere of Twilight: Breaking Dawn -- Part 2. (Facinelli and wife Jennie Garth announced their split after 11 years of marriage back in March 2012.) Since then, the two have been inseparable at red carpet events and via social media.
"It was a blast," another party guest tells Us.