Elizabeth Olsen and Tom Hiddleston are getting really cozy with one another. The 26-year-old "Avengers: Age of Ultron" actress is reportedly hooking up with her superhero co-star, Us Weekly reported.

A source told the publication that the relationship between the longtime friends - who become close while filming an upcoming movie musical "I Saw the Light," where they play a married couple - have a casual relationship. 

Both Olsen and Hiddleston are reportedly in no rush to add relationship "titles anytime soon, but they do make sure to text when they're apart."

The source added that the "Godzilla" actress "wants to make a new life for herself. She's having fun." 

In January, Us Weekly reported that Olsen had split from ex-fiance actor Boyd Holbrook after dating for nearly three years and getting engaged in March 2013. The couple met in 2012 on the set of their film "Very Good Girls" and reportedly hit it off immediately. Holbrook reportedly asked Olsen's father for permission before proposing to her in Paris.

"There was great chemistry there. She really likes him!" a source told Us Weekly at the time. Another insider added, "They've been by each other for a while, taking a lot of couple time, talking about getting engaged."

As for Hiddleston, he was previously linked to record producer Jane Arthy.