Killer smile, knockout body and a vicious right hook — that's the official scouting report on Clare Kramer, the latest hellraiser to join the cast of Buffy the Vampire Slayer. The Bring It On actress, who grew up practicing pliés and pirouettes with the hope of becoming a ballerina, plays the wicked Glory, a minion from hell bent on kicking some serious Slayer butt.

"What attracted me to Glory was the freedom that [Buffy creator] Joss Whedon was willing to give me in terms of developing her," Kramer tells TV Guide Online. "We discussed my thoughts on the character, and he liked my ideas. I'm having a great time playing her — she's extremely powerful."

The Delaware, Ohio, native has already made her presence felt on the set — no easy task considering that her formidable "foe", Sarah Michelle Gellar, is a brown belt in Tae Kwon-Do and one of the toughest chicks in primetime.

"I've already had a couple of fight scenes with Sarah and I loved doing them," Kramer enthuses. "I started taking boxing lessons about seven months ago with the same guy who worked with Denzel Washington on The Hurricane. It's pretty hardcore, but I love it. Now I watch boxing on television, and I'm going to see my first professional match next week. Whenever I get involved in an activity, I get completely into it."

Unfortunately, "Cassius" Kramer's co-workers might not share her enthusiasm — especially after she recently gave one of them two black eyes. "Oh, that was awful!" she says. "I accidentally punched [Sarah's] stunt double right in the forehead. I called her at home to apologize. She was very nice about the whole thing, but I felt terrible."

Would the actress ever consider stepping into the ring for real? "Oh no," she laughs. "While those lessons have given me some confidence and made me feel a bit safer, I don't think I have what it takes to be a professional boxer. I think I should just ride out this acting thing."