Rob Lowe has been melting hearts since the 1980s.

And the St Elmo’s Fire actor, 61, proved he still has it when he posed alongside his son, Johnny, 29, in a shirtless photo.

The elder Lowe pumped out his chest in the steamy selfie, which looked to be taken in his home gym.

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Both men looked to be in good shape, with Rob posing in a pair of shorts while Johnny wore just a pair of jeans, joggers and a cap.

Lowe Sr’s large tattoo was also on display in the photo.

“Lowe family tradition: self-indulgent shirtless gym photos,” they wrote on the image shared to both of their Instagram accounts.

Iconic Hollywood star Rob Lowe, 61, has sent fans into meltdown over shirtless selfie with lookalike son Johnny, 29, on Instagram. Credit: Instagram

Fans were thrilled by the photo, with a number of them remarking on Lowe Sr’s youthful appearance.

“Some family traditions are meant to be shared with the general public. We thank you,” one person wrote.

“Beast mode,” another wrote.

“Love the father son duo! You guys should do a max set of pull-ups and see what the numbers are,” another added.

Lowe has two children with his wife, Sheryl Berkoff, who he married in 1991.

Matt Lowe, the couple’s eldest child, is 32.

Johnny has followed his father into films.

Rob Lowe rose to fame in the 1980s as a member of Hollywood’s Brat Pack. Credit: Paul Natkin/WireImage

They starred in the 2023 TV series, Unstable, together.

The fworkplace comedy follows a socially shy son Jackson, played by Johnny, who works alongside his egocentric father Ellis in a high-tech bio research facility.

Rob Lowe has had many incarnations in his career, rising to fame as a Brat Pack star of the 1980s.

He appeared in 1983’s The Outsiders, Class, About Last Night, Wayne’s World, Tommy Boy, and Austin Powers: The Spy Who Shagged Me, which all gained a cult status with movie lovers.

Lowe also gained a loyal following as Sam Seaborn on NBC political drama, The West Wing, from 1999 to 2003.

His other television credits include Brothers And Sisters, Park And Recreation and 9-1-1: Lone Star.