Jon Hamm.

Yes, he has a good history with comedy but I don’t see him being that buoyant.

Dan Levy

Love the original, maybe Paul rudd he seems to have that frantic energy, but I could be wrong

Ryan Gosling. About 10 years ago, I would’ve said George Clooney, with no one else close. But I think he’s aged out of the role.

Grant was first a comic actor. He had just started his transition to serious acting. McConaughey could have done it, but he is too old now. I'll suggest William Jackson Harper. It is a bit close to his The Good Place role but not typecasting.

BTW, Grant hated his performance in the movie. I saw it recently and agree. He is too up, too manic. The film would benefit from a slower burn.

Yes, it’s a bit over the top but many of circumstances warrant a strong reaction. He did have a flair with rapid fire dialogue. I would to see a stage performance of the play.

I think "over the top" is the wrong expression. The movie was a theatrically stylized farce --in keeping with the fact that it was a famous play.

Channing Tatum

Joseph Gordon-Levitt as Mortimer.

David Tennant as Jonathan.

Michael Sheen as Teddy.

Timothy Spall as Dr. Einstein.

Hellen Mirren and Judy Dench as the Aunts.

The movie was also held back from release for something like two years. And I too agree with Grant - it is not one of his finest hours. The original stage part is not a movie star type, as Grant clearly was, and the constant panic and hysteria just did not suit him. Perhaps meriting the enmity of Grant fans, I do wonder if someone like Lou Costello, whose constant terror in Hold That Ghost from the same era was comedy gold, could have made the whole thing funnier.

That said, I think Ryan Reynolds has the right comedic instincts to pull a part like this off.

This movie would fucking rule