Robert Pattinson's beachside birthday

Robert Pattinson celebrated his birthday at a luxury Californian hotel.

The 'Twilight' actor - who turned 24 on May 13 - spent last weekend at the Ritz-Cartlon in Laguna Beach with girlfriend Kristen Stewart, where they dined at the Raya restaurant before taking a midnight stroll on the beach.

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A source told Hollywood Life.com: "They were making small talk, not chatting a lot, but seemed very comfortable with one another. They were low-key and not bugged by other guests, left to their own devices."

According to other hotel guests, the pair - who sat next to each other so they could both enjoy the ocean view - dressed casually in jeans and T-shirts, with the British star drinking beer with his meal.

Another source said: "You could tell they were a couple. They kept to themselves and looked like normal kids their age. They didn't stand out at all. They were dressed very casual - Robert with a baseball cap, jeans and sneakers, and Kristen was casual as well. Rob's hair was cut really short!"