In March 2010, Robert Downey Jr. was cast opposite Sandra Bullock in Alfonso Cuarón’s Gravity, only to walk away before filming began. The role of Matt Kowalsky went to George Clooney instead, after Downey balked at the confined spaces and hours-long setups required by the film’s experimental camera rig.
Robert Downey Jr. said no to George Clooney’s paycheck. Back in March 2010, he’d already signed on to play Matt Kowalsky in what would become one of the most acclaimed sci-fi films ever made, only to walk away before cameras rolled. His exit wasn’t about cold feet over the script or a scheduling clash with Marvel. It came down to something more personal: a discomfort with tight spaces that no amount of visual innovation could talk him out of.
A missed opportunity for Robert Downey Jr.
Long before he became Hollywood’s highest-paid actor, Robert Downey Jr. quietly walked away from one of the most acclaimed science fiction films of the century. The role was Matt Kowalsky in Alfonso Cuarón’s Gravity, and the reasons behind his exit say a lot about how the film was made, and about the actor himself.
The journey behind ‘Gravity’
Released in US theaters on October 4, 2013 by Warner Bros. Pictures, Gravity paired Sandra Bullock, as biomedical engineer Dr. Ryan Stone, with George Clooney’s veteran astronaut Kowalsky. When debris shreds their shuttle during a routine spacewalk, the two are left stranded in orbit with dwindling oxygen and no contact with Earth.
Critics embraced the film, and audiences followed. Gravity went on to gross more than $723 million worldwide, cementing its place as a technical landmark thanks to Cuarón’s immersive long takes and groundbreaking visual effects.
Why Downey Jr. stepped away
Cuarón announced Downey as Kowalsky back in March 2010, fresh off the actor’s Iron Man comeback. The partnership did not survive the film’s unusual production methods. Speaking on the Howard Stern Show in 2022, Downey recalled testing the multi-spherical camera rig built for the film’s effects. Twenty minutes in, he asked how much longer the session would run. The answer, another 2 to 4 hours, sealed his decision. “You have to know your limits and leave before you lose it,” he explained.
Cuarón confirmed the mismatch at San Diego Comic-Con in 2013. Downey, he said, thrives on improvisation and commanding a scene, while Gravity had to be preprogrammed before shooting even began. Downey’s discomfort with enclosed spaces did not help either.
Clooney and Bullock step in
After Downey’s exit, George Clooney took over as Kowalsky, while Bullock landed a part once eyed for Angelina Jolie. The gamble paid off handsomely. According to Stern, Clooney and Bullock each earned roughly $70 million from the film, with multiple outlets reporting Bullock’s profit-participation deal alone could pay her at least that much, underscoring the scale of the film’s back-end payouts.
No regrets for Iron Man
Downey insists he made peace with the choice long ago. “Everyone ends up doing what they’re supposed to do,” he told Stern, adding that nobody involved knew Gravity would become such a phenomenon. His own bet on Tony Stark, after all, turned him into one of the most bankable stars of his generation across a decade of Marvel films. Gravity is currently streaming in the US on Max, per JustWatch’s U.S. streaming guide.