Celebrity Alex Pettyfer Dating Marloes Horst "They've been dating for a few weeks and are very happy together," a source tells PEOPLE By Melody Chiu Melody Chiu Instagram Twitter Melody Chiu is a Senior Editor for PEOPLE. She has been with the brand since 2009, editing, writing and reporting across all entertainment verticals. She oversees PEOPLE's music and events coverage and has written cover stories on Taylor Swift, Selena Gomez, Melissa McCarthy, Blake Shelton and Sandra Oh. The Los Angeles native graduated from the University of Southern California and has appeared on Extra!, The Talk, Access Hollywood and Good Morning America. People Editorial Guidelines Published on April 10, 2014 07:30 PM Share Tweet Pin Email Photo: Alexandra Wyman/Invision/AP;Gilbert Carrasquillo/Filmmagic Sorry, ladies! Alex Pettyfer is off the market – again. The beautiful blonde who’s snagged his heart this time is model Marloes Horst, PEOPLE confirms. “They’ve been dating for a few weeks and are very happy together,” a source tells PEOPLE. The I Am Number Four heartthrob, 24, was most famously linked to Dianna Agron and Elvis Presley’s granddaughter Riley Keough in the last few years. “Happy birthday baby @a1pettyfer #birthdayboy,” Horst captioned a cozy photo of her and her new man on Thursday. The two appeared to be celebrating his big day at Disneyland. Horst was announced as Maybelline’s newest face earlier this week, and has recently modeled for DKNY, Stella McCartney and Adidas. Earlier this year, the actor revealed his sensitive side, telling Cosmopolitan U.K. his ideal date is at the movies. PHOTOS: Ladies’ Choice: Vote for These Male Stars’ Best Body Parts “I really like the traditional movie-and-dinner date,” he said. “There are all those excited new feelings when you’re in the cinema – you’re looking at each other, but trying not to I can think of about five dates when I couldn’t even tell you what we were watching.” We have a feeling we’ll be spotting these lovebirds cozying up at the movie theatre soon!