Kristin Chenoweth is known for her powerful voice, but when she’s not on stage the Broadway star admits to being surprisingly quiet. It’s not that she has nothing to say, Ms. Chenoweth saves her voice for her songs.

On Sunday, August 14 she’ll be singing on the Vineyard as a part of Broadway at the PAC. And she will even do some talking.

“I think it’s really fun and interesting to talk about music and experiences and why you sing a song,” Ms. Chenoweth said. “That’s one of my favorite aspects of performing live, the relationship between the audience and the performer.”

Ms. Chenoweth is a Tony and Emmy-award winning performer known for her Broadway roles as Glinda in Wicked and Sally Brown in You’re a Good Man, Charlie Brown. On television, Ms. Chenoweth is known from her roles as Annabeth Schott in The West Wing, Olive Snook in Pushing Daisies and April Rhodes in Glee. She’s a classically trained opera singer, but will sing a range of songs from musical theatre hits (yes, she will sing something from Wicked) to country and pop during her Vineyard show. Mary-Mitchell Campbell will accompany her on the piano.

Ms. Chenoweth keeps the drama on the stage. On her nights off she can often be found curled up on the couch in front of the television.

“Some would say, what a limiting life,” she acknowledged. “I don’t really go out a lot, I like to have my friends over to watch TV.”

She loves dark eerie shows and one of her favorites is Game of Thrones. Ms. Chenoweth will appear on a eerie show herself as the goddess Easter in the Bryan Fuller and Michael Green adaptation of Neil Gaiman’s novel American Gods, due to air in 2017.

But while on the Vineyard, she plans on hopping on a bicycle to explore. Ms. Chenoweth said she enjoys finding out about new places by talking to the locals. She plans to be a classic tourist when she’s not singing on the stage of the Performing Arts Center.

“I love to go somewhere really random and just talk to people,” she said. “I’m going to go see the sights and do the dorky things.”

For those lucky enough to run into Ms. Chenoweth on the bike paths or beaches, she is a repository of obscure movie quotes and knows a song for every situation. Even though she can burst out singing at any moment, Ms. Chenoweth said she’s happy life is not actually a musical or else it would be nonstop work.

“Musical theatre, when done well, doesn’t look like work,” she said. “My job is to make it look easy.”

On Sunday, she’ll be making songs by Andrew Lloyd Webber and Dolly Parton look easy. And she will be singing her “theme to life song” I Was Here.

“It’s about leaving your mark and how I want to be remembered,” she said. “I don’t know if I’ll ever not sing it; it says all I want to sing at the end.”

Coming to the Vineyard fulfills a dream for Ms. Chenoweth.

“It’s crazy to think I’ve been all over the world and I haven’t been here,” she said.

Kristin Chenoweth will perform Sunday, August 14 at the PAC at 6 p.m. Visit vineyardbroadway.com.