Celebrity Rob Pattinson Celebrates Kristen Stewart's Birthday with Pals The couple have a low-key Mexican fiesta for the actress's 23rd birthday By People Staff Published on April 12, 2013 04:00 PM Share Tweet Pin Email Photo: X17 Online Time for a fiesta! Robert Pattinson (and about 40 friends) helped Kristen Stewart ring in her 23rd birthday on April 9 with a margarita-fueled dinner at Malo, a Mexican eatery in Silver Lake, Calif. “They celebrated with Mexican food, beers and margaritas. Kristen was in a great mood,” an onlooker says of the pair. “She and Rob seemed great too. They were a bit affectionate, but mostly mingled separately.” After dinner, the group – which included Spring Breakers star Ashley Benson – headed to No Vacancy at Hotel Juniper in Hollywood for drinks. Stewart, who smiled “all night,” says a source, adds that “she and Rob looked happy together. They seem to be back to normal.” Next stop for the couple: The Coachella Music Festival, for which Stewart has rented a house in nearly Palm Springs. Robert Pattinson and Kristen Stewart Cuddle over Lunch