The actor - best known for his performances in `Superbad` and `Get him to the Greek` - admits his new film `Cyrus` was the first project he undertook where he had to "shake off" the character at the end of the day.
He said: "Yeah it`s definitely more of a dramatic stretch for me. It was the first time ever it was difficult for me to go home at the end of the day and shake off what I was doing earlier in the day and just hang with my friends or my girlfriend and be normal after playing such a severely affected guy."
`Cyrus` sees him play the disagreeable son of a character played by Marisa Tomei, and Jonah confesses his family is very proud of him for the role.
According to Movie Hole, he said: "It`s my family`s favourite movie I`ve ever been in. Some of the movies I`ve done my parents can appreciate that other people love them but they themselves aren`t massive fans of them.
"They just don`t like some of the language in the other movies. They do like `Superbad` and `Knocked Up` and `Forgetting Sarah Marshall` and `Get him to the Greek` but this was just more their thing."
`Cyrus` is set to be released in the UK on September 17.