Kate Beckinsale gives Chelsea Handler some tough love during the March 25 episode of After Lately, a semi-scripted behind-the-scenes look at E!'s Chelsea Lately. When the British actress, 39, joins the late-night host, 37, for a private yoga session, Beckinsale can't help but critique Handler's form -- and her figure.

"I've been sort of looking at your body a bit, and I feel like . . . it's not great, Chelsea," says Beckinsale, who executes each move with great precision.

"Well, okay, I get it. You have a great body," Handler tells her A-list pal. "But you don't need to stick my face in it. I see it! I mean, if I start doing this on a regular [basis], when does it kick in, the yoga?"

"It's not just the yoga," Beckinsale explains. "It's also what you're eating and what you're doing. You've got quite a toxic lifestyle."

When Handler asks Beckinsale what she's doing "that's so different," the Total Recall star replies, "I'm having juice. I'm having absolutely no food at all, let alone drugs and different types of penis every day. Do you know what I mean?"

Rolling her eyes, Handler fires back, "I don't have that much penis. I mean, come on, Kate -- you know my personal life and it's not that much. At least I stopped, I curbed it. People quit smoking! Tell me what to do and I'll do it."

After Lately airs Monday, March 25, at 10:30 p.m. EST on the E! network.