Jake Gyllenhaal and Rachel McAdams are supposedly “just friends”.
The A-listers have been seen out together on many occasions in recent weeks.
Speculation is rife the pair are seeing each other, but it is claimed they are simply preparing for their film Southpaw.
"They've just been meeting about the movie… It's really coming together," a source told Us Weekly. "[They have] good chemistry, [but] Jake and Rachel are just friends."
Jake portrays a boxer who is fighting his way to the top of his industry in Southpaw, which also stars Lupita Nyong’o and Forest Whitaker.
The actor went out with Rachel to see the Miguel Cotto vs. Sergio Martinez fight in New York City on Monday June 9 and they purportedly gathered lots of useful information from the outing.
“It's research for the film," the insider detailed. "Jake's been going to a few fights, and they've been meeting with the boxers...They were there to watch the fight and chat with the trainers and people involved with the sport."
Jake, 33, was most recently linked to Sports Illustrated model Alyssa Miller, whom he began dating in June 2013. They split just before the Christmas holidays last year, but it is rumoured they got back together around Valentine’s Day.
The Donnie Darko star previously dated actress Minka Kelly in 2012 after a whirlwind romance with singer Taylor Swift.
His last long-term relationship was with Reese Witherspoon, who he dated from 2007 to 2009.