Kristen Bell Credit: Jonathan Leibson/

Kristen Bell has never been happier -- or heavier!

The House of Lies actress shared new details about her first pregnancy during a Dec. 12 radio interview with CBS Detroit's Stoney and Bill. (Bell, who now lives in California, grew up in Huntington Woods, Michigan.)

"I am currently quite a bit overweight," the Veronica Mars star admitted. "I'm about 367 pounds. I'm not sure how far that is in months, but in pounds, that's where I'm weighing in."

That same day, Bell joined Mark Duplass and Lizzy Kaplan at the Sundance Institute's documentary film program reading of Life Partners at the Ivy Substation in Culver City, Calif. The star -- engaged to Parenthood actor Dax Shepard, her love since 2007 -- showed off her growing baby bump in a loose-fitting gray knit sweater as she ran lines with her peers.

Bell, 32, and Shepard, 37, will welcome their first child in the spring of 2013. "They are the cutest couple. They are so in love and completely committed to each other, no question," a source recently told Us Weekly of the engaged pair, who have pledged to remain unwed until gay marriage becomes legal. "One of those relationships you're jealous of."