Robert Pattinson and Kristen Stewart
Robert Pattinson and Kristen StewartReuters

Looks like Robert Pattinson is adamant about being with Kristen Stewart on her 24th birthday.

The Twilight star is back in Los Angeles after a long stint of filming overseas – and just in time for former girlfriend Kristen Stewart's birthday, which is on April 9.

"He wanted to make sure he was in LA for Kristen's birthday," a source revealed to Hollywood Life. The on-again, off-again couple is planning a special, long-awaited reunion, according to an insider.

Pattinson has been busy with his films, Queen of the Desert and Life, filming back-to-back in different parts of the world.

On March 30, Pattinson was spotted filming scenes for his upcoming film Life at West Hollywood's swanky Chateau Marmont.

"Rob is back in town and he's super psyched to spend some quality time with Kristen," a friend of Pattinson told Hollywood Life. "He just arrived to film some scenes for the movie Life, which he was working on in Toronto."

Wonder if the shooting schedule was simply a coincidence or if the actor really wanted to make sure he was in town for Stewart's special day.

"They haven't actually seen each other yet, but plan on reuniting in the next day or so with all of the dogs in tow. It's been like four months since they've seen each other. He wanted to make sure he was in LA for Kristen's birthday," the friend said.

Meanwhile, Pattinson was also rumoured to be hooking up with model Dylan Penn (with whom he had been linked earlier in 2013) and the two reportedly had plans for a romantic rendezvous in Madrid, Spain.