Kristen Bell wants her bottom to resemble ''two round cupcakes''.

The 31-year-old actress - who strips down to her underwear in new series House of Lies - admitted she upped her exercise regime when she found out she would be stripping off, but said those who expect to see her fully nude can "dream on."

"I want two round cupcakes, always. I kicked my buns and abs sets into high gear when I knew I'd have to be in my bra and underwear on House of Lies. But I don't show my crack! All the Mr. Skins of the world are like, 'Ooh, Kristen gets naked!' I'm like, 'Dream on!'"

It would appear Kristen's fiance, Dax Shepard, is also a fan of her "cupcake" rear, as she joked that the couple "nauseate" themselves with how "mushy" they can be: "We nauseate ourselves with how mushy we are," she said.