The on-again couple and X-Men costars were snapped by an excited Twitter user, who posted a selfie with the two celebs in the background during the London post premiere party.
Nicholas' sister Rosanna also was on hand to support J. Law during her London premiere. "On route to the Hunger Games London premiere. Excited!" she Tweeted Monday.
Jen and Nic first met on set of X-Men back in 2010 and dated seriously before splitting up in January 2013. But they rekindled their romance when they worked closely together again this year, playing love interests in X-Men: Days of Future Past.
We're glad to see their relationship is still going strong even though they've wrapped their movie together! Now we just want to see Nic escort Jen on the red carpet for the Catching Fire US premiere.
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Gallery | J-Law Stays Classy on the Red Carpet