Are Loki and Scarlet Witch an item? According to US Weekly, Marvel villains and "I Saw the Light" couple Tom Hiddleston and Elizabeth Olsen have started up a "casual" romance offscreen as well.

"They have been hooking up," a source reportedly told the magazine, adding that they "text when they're apart."

It's unclear whether Olsen and Hiddleston met on the set of "Avengers: Age of Ultron" or while screen testing together for the upcoming Hank Williams biopic "I Saw the Light." Hiddleston plays Williams, while Olsen plays the singer's manager, duet partner, and first wife Audrey.

RELATED: Elizabeth Olsen, Boyd Holbrook Split? 'Avengers: Age of Ultron' Star and 'Gone Girl' Actor Reportedly Called Off Their Engagement

After they met on the set of "Very Good Girls" in 2012, Olsen and actor Boyd Holbrook were engaged for nearly a year before splitting in January of 2015. Now it seems the actress "wants to make a new life for herself" and is "having fun." (Charming and good-natured Hiddleston seems like a great choice for that.)

RELATED: 'Godzilla' Star Elizabeth Olsen Talks Weddings, Nude Scenes: 'I'm Keeping My Clothes On for a Couple of Years'

Hiddleston, meanwhile, hasn't been publicly linked to anyone for some time. Incidentally, this isn't the first time he's been rumored to be dating a co-star. He's been linked to fellow "Thor" star Kat Dennings and his "Crimson Peak" sibling Jessica Chastain, and reportedly got pretty serious with Susanna Fielding after meeting her on the set of "Wallander."

RELATED: The Complete Tom Hiddleston Girlfriend List: Jessica Chastain, Kat Dennings, Jane Arthy and Every Other Rumor

This report should be taken with a grain of salt, but we have to ask - do you think Hiddleston and Olsen make a good couple?

This article was originally published on Fashion & Style