Michael J. Fox Teams Up with 'Back to the Future' Co-Star Christopher Lloyd for Teasy Announcement

NEW YORK, NEW YORK - OCTOBER 08: Actors Christopher Lloyd (L) and Michael J. Fox attend a "Back To The Future Reunion" at New York Comic Con on October 08, 2022 in New York City. (Photo by Mike Coppola/Getty Images)

Marty McFly and Doc Brown are up to something again—and it's about to hit fans like a bolt of lightning!

The popular Back to the Future characters played by Michael J. Fox and Christopher Lloyd were top of mind this week for fans who follow the actors on social media, due to a teasy announcement that Fox and Lloyd shared together.

After first hinting at the news on their Instagram Stories on Wednesday, May 1, the two actors have now unveiled their exciting new project in honor of the 1985 film, which celebrates its 40th anniversary next year.

In new Instagram photos posted on Thursday, May 2, Fox and Lloyd modeled matching white Back to the Future T-shirts, which are now available for fans to purchase for themselves.

"Heavy!" the pair wrote on Instagram while announcing the limited-time merch collection, which features several other nostalgic clothing items based on the beloved film, including a "RockNRoll" tee and a "Nobody Calls Me Yellow" tee.

Sharing the link to their limited-edition online shop, Fox and Lloyd told fans to "act fast" as the new products will only be available for 30 days.

In addition to the photo of the duo wearing the white T-shirts, they also re-posted the pic that they initially used to tease the news a day prior.

In that pic, the actors were once again wearing matching Back to the Future T-shirts, this time modeling the black "Watch" tee. Fox, 62, and Lloyd, 85, stood side by side with their knees slightly bent as they held their left arms outstretched, their wrists in front of them as if holding up watches for them to study. Lloyd wore a surprised expression on his face as he glanced at his watch-less wrist, his right hand clamped onto Fox’s shoulder.

They appeared in several more photos on the merch website modeling a variety of different products, including a shot of Fox wearing a "Silence Earthling" hoodie and Lloyd modeling a "Great Scott!" tee.

Other items available for purchase include an "88 MPH" Long Sleeve shirt, a "Mr. Fusion" hoodie and water bottle and a BTTF mug.

The site also has three signed items listed, including a Marty McFly Denim Jacket signed by Fox (priced at $399.99) and a Doc Brown Button-Up signed by Lloyd ($199.99.) Plus, they are also selling a poster signed by both of the iconic actors, which is going for a whopping $499.99.

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The announcement comes just a couple of weeks after The Houston Chronicle reported that the actors are expected to be part of this year’s Comicpalooza, an annual pop culture convention that is taking place this year over the Memorial Day weekend in Houston, Texas.

Fox, Lloyd and their fellow Back to the Future cast member, James Tolkan, will be in attendance for “The Great Scott! Experience 1985” on Sun., May 26, according to the convention’s website.

Next: Why Michael J. Fox Is Calling His Parkinson’s Diagnosis a ‘Gift’