Fans are running rampant with conspiracies after observing costars Sydney Sweeney and Glen Powell's body language and intense chemistry offscreen

• Costars Sydney Sweeney and Glen Powell recently wrapped filming their R-rated rom-com "Anyone But You."
• Fans are dissecting interviews and behind-the-scenes footage, convinced the actors took their chemistry offscreen.

Social media is abuzz with speculation that costars Sydney Sweeney and Glen Powell took their chemistry offscreen while filming their forthcoming romantic comedy, "Anyone But You."

Though the fervor could simply mean that the two are incredibly good at their jobs, a tidal wave of rumors and conspiracies has resulted in close dissections of Sweeney and Powell's body language during recent interviews.

Fans are so convinced that the two have crossed professional and personal boundaries that some are now flooding their Instagram pages with critical comments — given that both actors are reportedly in relationships. (Powell is dating the model and fashion entrepreneur Jehane-Marie "Gigi" Paris, and Sweeney has been engaged to the restaurateur Jonathan Davino since 2022.)

Viewers first took notice of undeniable chemistry between the costars when photos and videos behind-the-scenes of their filming trickled across social media last week. Since, a deluge of clips has been posted by sleuths to prove their theories that the two actors are in love.

In one, where Sweeney appeared to do a trustfall onto Powell's lap, a Twitter user reacted, "Yeah that's not normal."

On Monday, online gossip made real-life headlines when Page Six reported that Paris had unfollowed Sweeney on Instagram. This would mark a turn from their previous interactions on the app, as in January, Paris had celebrated Sweeney's post announcing the film.

By Tuesday, fans began feverishly dissecting an interview between the two costars posted by Sony Pictures to TikTok. Some noted that Sweeney wasn't wearing an engagement ring, and observed the couple's intimate body language and locked eye contact.

"I feel like i'm interrupting something," one user wrote. "This is giving Cassie IRL," said another, referring to Sweeney's character on the HBO show "Euphoria," who has an affair. "The video ending with them pressed against each other," a third viewer noted.

Speculation also ran rampant on Twitter. One user speculated that Paris was sharing breakup songs and forlorn messages on Instagram. Paris' Instagram account is also flooded with supportive comments, including "You deserve better," on her latest post.

Sweeney and Powell, on the other hand, are receiving blowback. "You ruin everyone's relationships," one fan wrote under Sweeney's latest Instagram post. Another added, "She don't deserve those looks."

"Respect your partner," someone wrote on Powell's latest Instagram photo, where he's seen next to a koala.

"Anyone But You" is an R-rated romantic comedy that reiminages Shakespeare's play "Much Ado About Nothing."

It wouldn't mark the first time that offscreen antics by two costars have spurred intense speculation on social media. In 2021, viewers raised eyebrows when the actor Oscar Isaac seductively sniffed costar Jessica Chastain's arm on the red carpet for their HBO show "Scenes From a Marriage." Powell himself has been the subject of numerous relationship rumors for having palpable chemistry with women co-stars. In 2018, fans were also convinced that he was dating actor Zoey Deutch after filming their Netflix rom-com "Set It Up."

"It's been said but imma say it again," one TikTok commenter wrote, "Is it really a good romcom if the chemistry between the leads doesn't cause cheating rumors?"

Insider has reached out to Sweeney and Powell's reps for comment.