"Harry Potter" star Daniel Radcliffe joined Katie to catch up and discuss his career, his upcoming movie "Kill Your Darlings" and his television miniseries with Jon Hamm of "Mad Men."
"Following Harry Potter, I think you've been very smart about choosing, as you said, interesting roles that keep people engaged in your career," Katie noted.
Interesting and daring roles in Broadway shows like "Equus" and "How to Succeed in Business Without Really Trying."
So how does performing on stage compare to the films that Daniel's done in the past?
"I grew up on film, so I'm immensely comfortable on a film set," he said, "But I find it hugely educational doing stage work."
For Daniel it's important to find ways of keeping his stage work fresh: "If you're bored, the audience will be bored."
Daniel also discussed his upcoming miniseries, which co-stars one of Katie's favorite actors, Jon Hamm.
"He's a lot of people’s personal favorite," Daniel noted. "He's made many people swoon. I've watched it."
The show is called "The Young Doctor's Notebook," a dark comedy about a doctor in 1970s Russia.
"It's like 'Scrubs' if they had really terrible equipment," he said.
But Katie still wanted to know how the boy who once played Harry Potter grew up and transformed into the young man now playing Allen Ginsberg in "Kill Your Darlings."
"What really guides you when taking on roles?" Katie asked.
"All the actors that I admire, the thing they have in common is that they have incredibly varied, diverse bodies of work behind them," he revealed. "Apart from anything else, it makes my job more fun for me -- by keeping things varied and not repeating myself."