Jupiter Ascending star Mila Kunis is engaged to her longtime boyfriend Ashton Kutcher, or that's what the diamond ring on her left hand suggest.

The 30-year old actress was spotted sporting a fat rock on her ring finger as posted by US Magazine on Thursday while she was out in Los Angeles.

Jupiter Ascending star Mila Kunis and boyfriend Ashton Kutcher met on the set of the hit TV series "That 70s Show" and started dating following Ashton's split with wife Demi Moore.

Kunis was in a long time relationship with "Home Alone" star Macauley Culkin before hooking up with Kutcher.

Reps of the couple haven't confirmed nor denied the news though, but the couple has reportedly been talking about marriage already.

People reported that Mila and Ashton "have talked about getting married for quite a while." The insider added that the couple are "incredibly happy together."

Meawhile, Kunis has done filming her new scifi movie Jupiter Ascending, where Kunis plays the title role "Jupiter" who is about to become the queen.

Jupiter Ascending official trailer of The Wachowskis' much talked about space drama movie has recently been released and from the looks of it Channing Tatum who plays the role of Caine, sent to kill Mila Kunis' character Jupiter Jones will become her interplanetary knight in shining armor.

The first official trailer from the Warner Bros. film, due to hit cinemas on July 25, featured Channing Tatum on his sci-fi role being a "perfect hunting machine" assigned to kill Earth-born Jupiter Jones.

Watch Jupiter Ascending Official Trailer Here:

Mila Kunis who plays the role of Jupiter Jones, an Earth-born Russian immigrant who works as a janitor for a living is about to get the biggest news of her life - "the stars were pointing to an extraordinary event on the night she was born, and that her DNA could mark her as the universe's next leader," as told by Caine.

In his interview with MTV News earlier this year, Tatum spoke about the challenges that he had to go through filming the ambitious sci-fi epic "Jupiter Ascending."

"It's crazy -- it's a tough movie," the actor said. "We're trying to do stuff that's never been done before, in three different aspects. We're trying to do stuff that's never been done in CG before, we're doing stuff with cameras that's never been done before, and we're trying to do stuff with stunts -- like, actual, real stuff so we don't have to use a bunch of CGI stuff."

Tatum who is very much familiar with action films, aside from show casing his dancing skills in "Magic Mike" and "Step Up"

Tatum is known for his action film roles. Aside from showcasing his dancing skills in hit movies "Magic Mike" and "Step Up," he was also cast in projects that include heavy stunts like "G.I. Joe" and "White House Down." Apparently, this film nearly got him killed.

"You have a pre-vis that has already been cartooned out to the way they want it to look, and I'm trying to match that in physicality," he said. "It's crushing, but when you do get it, it's amazing. I just hope we finish the movie -- because it's killing me."

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