Emmy Quickie: ‘Billions’ Star Maggie Siff Reveals Who Sings Show Tunes on Set (Video)

Actress also tells TheWrap pet names she shares with Paul Giamatti

“Billions” is a show about money and power, but series star Maggie Siff revealed to TheWrap some of the more lighthearted moments on set.

“Paul [Giamatti] and I have little pet names for each other,” Siff said. “During our domestic squabbles, we become ‘Buck’ and ‘Cindy.’ And he goes, ‘Oh, Cindy, Cindy, Cindy!’ and teases me a lot. And Damian [Lewis] likes to sing show tunes, surprisingly.”

But even without a singing Damian Lewis, Showtime’s “Billions” is one of the most compelling series of the season. Siff believes she knows what it is that draws viewers to the new hit drama.

“There is some great acting. I’m not talking about even myself,” she said with a laugh. “It’s a surprisingly visceral, sexy drama about a hedge fund kingpin and a U.S. Attorney and this sort of clash of the titans. With Damian Lewis and Paul Giamatti playing those characters, you sort of can’t go wrong.”

Siff plays Wendy Rhoades, a psychiatrist and wife of Giamatti’s Chuck Rhoades. But she is perhaps best known to TV fans for playing Dr. Tara Knowles-Teller on the long-running FX series “Sons of Anarchy.”

“The thing for me that has been funny — for so many years, I was on ‘Sons of Anarchy,’ so I was very used to a certain kind of fan,” she said. “And this is a different kind of fan — a lot more sort of old white men in suits, although that’s not the extent of our fan base.”

And seeing as Lewis’ Bobby Axelrod character is famous for picking a winning company idea out of the fray, we asked Siff what her own startup would produce.

“My startup company would have something to do with toddlers, because that’s my life when I’m not shooting. I chase little toddlers around,” she said. “So maybe it would be toddler shoes.”

Watch the video above.