Jennifer Lawrence's X-Men: Days of Future Past costar and ex-boyfriend Nicholas Hoult were seen together at the racetrack for the Canadian Grand Prix in Montreal, Canada.

Other cast members also accompanied the stars as they attended the annual Formula One race on Sunday.

The 22-year-old actress wore a black dress covered with a sweater that had colorful sleeves. She also sported a black hat. The Oscar-winner stood next to Holt who kept it simple by wearing a baseball hat, black jeans and a T-shirt. See photos of both of them here.

These photos come a week after Lawrence and Hoult were also seen casually hanging out together in Montreal on June 5.

The two, who met on the set of X-Men: First Class and broke up last year after dating for two years, are currently filming the movie's newest installment.

Lawrence was spotted on the film's set as the red-haired blue mutant in photos published on MovieWeb.com on Monday. Tons of fans sat around watching as Lawrence got into her character Mystique, who is a shapeshifter. See all those photos here.

"Just like any insecure teenager with any secret, I think she's learned to live with it because she had to but she hasn't really owned it yet and she's mostly just ashamed of it," Lawrence said about her character Mystique's nature in an interview with Clevver Movies in 2011. "And what I like about the movie is that she slowly starts to realize that it is a blessing and she is proud of it."

The movie's director, Bryan Singer, had also posted a photo of the actress's transformation on his Instagram in May.

"#JenniferLawrence as a vengeful #Mystique. #XMen #DaysOfFuturePast," he wrote.

In the prequel X-Men: First Class, Lawrence's costume was created with blue body paint. Lucky for her, she's able to just slip into a body suit for this movie.

The film, which will also star more cast members from First Class, including Michael Fassbender, Anna Paquin and Halle Berry, is set to hit theaters on July 18, 2014.

Tags: Jennifer Lawrence nicholas hoult X-Men Days of Future Past