Jennifer Lawrence sparked rumors that she is engaged to actor Nicholas Hoult after she was photographed sporting a diamond ring on her wedding finger last week.

The Oscar-winning actress, who has been busy making her publicity rounds for her upcoming film, The Hunger Games: Catching Fire, sparked rumors at a recent press event. Yahoo's OMG! U.K. published a photo on Monday of Lawrence sporting a square-shaped sparkler.

See Lawrence's engagement ring photo here.

However, when she attended the worldwide premiere of Hunger Games: Catching Fire in London on Monday, she was not wearing the ring.

Lawrence and Hault reportedly reignited their relationship this summer when they began working together again on X-Men: Days Of Future Past, a source told Us Weekly.

In the film, Lawrence plays the younger Raven Darkhölme/Mystique. (Rebecca Romijn played the raven-haired beauty in the first X-Men film.)

Hoult is also reprising his role as Hank/Beast for the upcoming film. He has a cult following for his zombie movie Warm Bodies and his last film Jack The Giant Slayer, which arrived in theaters in the spring.

Lawrence's next film, Hunger Games: Catching Fire will arrive in theaters on Nov. 22 while X-Men: Days of Future will hit the big screen in 2015.

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Jennifer Lawrence