I've gotta be honest: Ben Affleck [1] seems remarkably chill about the fact he's no longer going to be playing Batman [2] in the DC film franchise.

Despite appearing as the caped crusader in three recent movies — Batman v. Superman: Dawn of Justice, Suicide Squad, and Justice League — Affleck is hanging up his batsuit to make way for a younger version of the character, who will take over the mantle in 2021's The Batman [3]. Rather than making his retirement from the character a big to-do, Affleck retweeted [4] the news of his departure in January, adding, "Excited for #TheBatman in Summer 2021 and to see @MattReevesLA vision come to life."

He continued his streak of taking it all in stride while sitting down with Jimmy Kimmel [5] on Thursday to promote his next film, Triple Frontier [6]. Naturally, the discussion led to Batman, and the 46-year-old star had a fairly simple explanation as for why he's stepping away.

"I tried to direct a version of it and worked with a really good screenwriter but just couldn't come up with a version — I couldn't crack it and so I thought it's time for someone else to take a shot at it," he said. "They got some really good people so I'm excited."

Watch him explain above, and keep your eyes peeled for a cameo from Jimmy Kimmel Live!'s Guillermo Rodriguez dressed up in an old-school Robin uniform as they retire Affleck's cape.