Via Esquire.com:

Though there’d been rumors throughout the recent months, it still hadn’t been confirmed whether or not Alden Ehrenreich would be returning to play the iconic character Han Solo after the upcoming stand-alone Star Wars movie next month.

In an interview for Esquire’s latest cover story, the actor let slip that he’s actually signed up for three movies. As Alex Pappademas writes:

He knows what he’s getting into. It’s a deeper commitment than just one movie. Even Ford couldn’t quit after just one. I ask Ehrenreich how many he’s signed up for. “Three,” he says, then flinches, understanding he may have just created a disturbance in the Force. “I don’t know if that’s officially, uh, public. But—yeah.” Anyway: Between auditions for Solo, Ehrenreich took a trip out to Death Valley. “I stayed in, like, a high-end tepee, which you can rent out there,” he says. “I’m making myself sound a lot more rugged than I actually am. I’m also getting green juices delivered to the tepee.”
Which shows that Lucasfilm is certainly confident with his performance in Solo, along with the movie’s quality as a whole if it’s good enough to support two sequels.