Robert Downey Jr. confirms he will appear in 'Avengers 4'

Oct. 30 (UPI) -- Robert Downey Jr. will reprise his role of Tony Stark in Marvels' superhero ensemble movie Avengers 4.

"New flick, new short chair. #lumbarsupport #marvel #bts," the 52-year-old actor captioned an Instagram photo of seats with the character names Scott Lang, Natasha Romanoff, Steve Rogers and Tony Stark embroidered on them.

Paul Rudd plays Lang/Ant-Man, Scarlett Johansson plays Romaoff/Black Widow, Chris Evans plays Rogers/Captain America and Downey Jr. plays Stark/Iron Man.

The stars will also appear in Avengers: Infinity War, which is due in U.S. theaters May 4. Avengers 4 is set for release May 3, 2019.