“Smash” 10 p.m. Mondays, NBC

PASADENA, Calif. — Actor Christian Borle swung from the saddest time of his life to pure joy in a matter of weeks. It was daunting, he admits, as he eases into a booth in the corner of a hotel lounge here.

Borle is a jubilant participant in NBC’s smash hit, “Smash.” He plays Tom Levitt, the songwriting partner of Debra Messing, as they prepare a musical based on the life of Marilyn Monroe.

“I got the show two weeks before my father died,” said Borle. “I had just finished ‘Angels in America.’ So as my father was slowly deteriorating, I was doing a play about grief and fear of death and deterioration. And in a way, that is the great gift of being an actor is I was able to go in and exorcise these feelings, all the fear, all the pain.”

The experience changed him, he thinks. He’s more appreciative of life, but also more chastened. So far most of Borle’s work has centered on Broadway theater. He was nominated for a Tony for “Legally Blonde — the Musical,” co-starred in the musical version of “Mary Poppins,” and boasted several roles in “Spamalot.”

“Smash” marks his first major television role. “Having this amazing good fortune of working toward something I love and having ‘Smash’ happen, whatever happens with it, however it is received, however long it lasts, it’s already been unbelievable,” said Borle, 38.

Like many performers, he knew what he wanted to do early on. “I did a lot of plays in elementary school like everybody did. … I had incredible teachers — in the sixth through 12th grade, in Pennsylvania, and they really encouraged me. My parents were very liberal, lovingly open-minded people who supported the arts. So I never got any of that ‘You have to be a doctor’ or any of that. So as soon as I got the bug, they just encouraged me. I was really lucky.”

His very first job when he trekked to New York at 21 was as Swifty the Elf in Macy’s Santa Land. “It was really a beautiful place to work, actually,” he said, laughing.

“The people who run Santa Land are dedicated, lovely people, it was really a great, crazy experience. The one dictum when you get that job is that you have to stay through New Year’s, because what they get is people who come and work through Christmas Eve and quit to go home to their family. So if you quit before New Year’s Day, you are pink-listed — you can never work there again. And I got pink-listed.”

“Swifty the Elf” had landed a paying acting job and had to leave before the deadline, never to darken Macy’s door again.

He also tried bartending at a local watering hole called Vintage. “That’s where a lot of the young Broadway people hang out,” he said. “It’s actually mentioned in Episode 3 of ‘Smash.’ ”

While he made an energetic elf, he wasn’t such a keen bartender. “I was fast and polite, but I didn’t know a lot of the drinks. It’s hard when you are in the weeds, it’s not like you can duck back behind the bar and look (up the recipe). It’s embarrassing.”

A major turning point arrived with his divorce from actress Sutton Foster after three years of marriage.

“We separated in ’07 before ‘Angels in America.’ I adore and respect my ex-wife, it was just a lesson in terms of what we think we are supposed to do growing up — part of the rite of passage.

“I think that I didn’t really think for myself, think about what I was doing necessarily. It’s a function of growing up. I got married because I loved her, but I didn’t think about whether or not there are any other alternatives. Just in terms of — this is what adults do. That’s a great lesson.”