Tom Cruise's "Mystery Girl" Revealed — She's a Famous Sibling! (EXCLUSIVE)

INSET: Tom Cruise was spotted chatting with the "mystery girl" aka Jennifer Akerman at a club in Sweden early last week.

INSET: Tom Cruise was spotted chatting with the "mystery girl" aka Jennifer Akerman at a club in Sweden early last week.

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When photos surfaced of Tom Cruise, 50, chatting with a pretty blonde at the Rose nightclub in Stockholm, Sweden, following the premiere of his new flick Jack Reacher early last week — everyone immediately asked: Who's that girl?

And now Life & Style has the answer! We can reveal that Tom's mystery girl is Jennifer Akerman, the younger sister of actress Malin Akerman.

Malin Richardson, who writes Mogis Blog, was at the same party and dished to Life & Style about Tom's night at the club.

"I was in the VIP area and he was super nice and polite," she shares. "Not flirty, just very open-minded. He didn't mention Katie [Holmes] or Suri [their daughter]. He was very professional. He was talking to a lot of people during the night. The picture going around is Tom talking to Jennifer."

NEWS: Tom Cruise reunites with Suri

Before hanging out with the action star, Jennifer was excited to attend the festivities.

"Tom Cruise premiere tonight in Stockholm followed by London tomorrow," she tweeted on Dec. 11. "Life is pretty good!!"

So how might these two know each other? Tom starred alongside Jennifer's sister Malin in the 2012 summer flick Rock of Ages — and they got pretty close while filming!

PHOTO: Tom Cruise celebrates Usher's 34th birthday

"All I know is that there was a lot of face-licking, and it went on and on and it went all over my face," the 34-year-old, who just announced her pregnancy nearly three months ago, says about filming her racy makeout scene with Tom in the film. "I can't quite remember what made it into the movie because I was covering my eyes and sliding down my chair."

NEWS: Malin Akerman pregnant with first child

Since splitting with his wife of six years, Katie Holmes, in June, the pair have yet to publicly start seeing anyone.

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