The Harry Potter star ended his run in the hit New York play on New Year's Day (01Jan12) and he was replaced as social climber J. Pierrepont Finch by Glee actor Darren Criss for a three-week stint.
Jonas took over from Criss last week (24Jan12) and Radcliffe has given the Burnin' Up hitmaker's performance the thumbs up.
Speaking on U.S. morning show Live! With Kelly on Tuesday (31Jan12), guest co-host Radcliffe revealed, "I saw How To Succeed the other day with Nick Jonas and he's wonderful in it. He's a wonderful person as well and it was a real treat to meet him and be able to watch the show."
The exhausted Brit admits he's eager to expand on his theatre experience, but he won't be looking to return to the stage until next year (13).
He added, "I had an absolutely amazing time doing it, I miss it already. I've no idea what the next stage thing will be, but... I'm gonna give it a year before I go back to stage so I can just rest!"
Jonas will headline How to Succeed in Business Without Really Trying until 1 July (12).