America’s sweetheart may officially be off the market.

Engagement rumors have started to catch fire this week after actress Jennifer Lawrence was spotted wearing a very sparkly diamond ring on a very important finger at “The Hunger Games: Catching Fire" press event.

According to a rumor originally fueled by gossip blogger Perez Hilton, the 23-year-old actress may be engaged to her “X-Men: Days of Future Past” co-star and on-again, off-again boyfriend of two years, Nicholas Hoult. “The queen of quirkiness Jennifer Lawrence just MAY be engaged to her cutie pie boyfriend Nicholas Hoult!” read the report, which claims the actress was spotted wearing the sparkler at a press event in London Monday but sported a different diamond on her ring finger at the London premiere later that night.

“Maybe she switched it in order to keep the engagement hush-hush a little longer,” suggested Hilton, who later added, “That OR it wasn't an engagement ring and we'll have to wait a little longer before these two become more than BF/GF!! But it definitely looks like a sparkly shining engagement ring to us!!!!”

The duo, who first met on the set of “X-Men: First Class” in 2011, was last spotted in public attending a “The Hunger Games: Catching Fire” premiere party in London Monday night. While they didn’t pose for photographers on the red carpet, a fan photo posted on Twitter confirms the 23-year-old actor did attend the event. According to a report from the Huffington Post, Hoult also accompanied his leading lady to an after-party at the Royal Court of Justice following the film screening.

The two-time co-stars made headlines earlier this year after Lawrence admitted during an interview with Vogue in August that the actors have rekindled their romance following a brief split in February. “I wake up earlier in the morning when I have new sponges. That counter doesn't even see it coming,” Lawrence said. “…[Hoult] would never wring them out. We were in the kitchen once, and I picked up the sponge, and it was soapy and wet, and I was like, 'See? These are the kinds of things that make me think we are never going to work.”

“The Hunger Games: Catching Fire” opens in theaters on Nov. 22.

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