Channing Tatum and Mila Kunis 'Cheating,' Ashton Kutcher Jealous? Sexy Girlfriend 'Gets Cozy' with Jenna Dewan's Hubby/Baby Daddy On 'Jupiter Ascending' Movie Set

Channing Tatum and "Sexiest Woman Alive" Mila Kunis are currently together filming the upcoming sci-fi flick "Jupiter Ascending" - and Kunis' boyfriend Ashton Kutcher is apparently mega-jealous of the "Magic Mike" heartthrob! The National Enquirer insists that "nothing romantic" is going on between Jenna Dewan's hubby and the "Black Swan" beauty, but Kutcher still can't stand their instant onscreen chemistry!

The Enquirer starts off by reporting that "Ashton's red-hot girlfriend Mila Kunis is cozying up to Channing on the set of their new movie." Here's the movie description for "Jupiter Ascending," set to be released in July 2014:

Jupiter Jones [Kunis] is an unlucky Russian immigrant who cleans toilets for a living. She encounters Caine [Tatum], an interplanetary warrior whom the Queen of the Universe sent to kill Jupiter. Caine tells Jupiter that 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.

Despite working alongside the drop-dead gorgeous "Ted" starlet, Tatum remains loyal to his wife Jenna Dewan. The couple welcomed their first baby daughter earlier this year.

Still, that doesn't mean Kutcher's not somewhat envious!

An alleged friend of Demi Moore's ex tells the gossip mag, "Ashton knows they're just working together and that his jealousy is irrational, but what gets to him is how Mila raves and raves about how nice and charming Channing is." The onscreen collaboration is "burning Kutcher up" and "he's even been keeping tabs on her through mutual pals on the movie."

The source concludes with, "It's not hard to imagine why Mila getting so close to Channing would make Ashton worry." 

The Enquirer points out that "In truth, Ashton has nothing to worry about." But still, Tatum and Kunis "getting cozy" on-set? Come on now! They may be two of the hottest stars in Hollywood, but both are in loving, serious relationships. And Kutcher and Dewan have nothing to worry about.

Gossip Cop reached out to another insider who insists that such jealously claims are "absurd."