That'll leave a mark!
10 Things I Hate About You actor Andrew Keegan was tasered by police after officers visited the scene of a party he was throwing in Marina Del Ray, Calif., Saturday.
VIDEO: The week's top star headlines
Keegan, 32, was pulled aside after reportedly receiving a noise complaint, and TMZ.com reports the actor became "very aggressive" when cops asked him to turn his music down.
Though TMZ reports Keegan was not arrested, the police altercation left the actor -- and his party guests -- reeling.
PHOTOS: Stars who've had trouble with the law
"He was tasered right in front of me," one eyewitness tells Us Weekly. "Oh my God, it was so awful."
Another partygoer tells Us LAPD helicopters were circling the Venice Beach area as 15 police officers descended on the residence.
PHOTOS: This week's top celeb pics
"He was throwing a block party [and I] saw it happen," says the witness of Keegan, who also appeared on The WB's 7th Heaven. "You could tell he was in pain."
Get more Us! Follow us on Twitter, Friend us on Facebook, Subscribe to Us Weekly
See where the cast of "Cruel Intentions" is today.
The Rock flexes massive muscle while getting sentimental on Celebs Gone Social hosted by Wonderwall editor Chris Gardner.
Rihanna, Katy Perry, and Heidi Klum all get an F on this week's Fashion Offenders.
Sarah Michelle Gellar talks to Wonderwall's Chris Gardner about "terrifying" paparazzi, growing veggies with her daughter, why she never went to rehab.
From Mila Kunis to Mary-Kate Olsen, get the scoop on all the engagements in Hollywood on Replay.
From Christina Aguilera to Jennifer Hudson, see some of Hollywood's ever-changing waistlines.
Nicole Richie debuts a lavender hair color on Instagram on Celebs Gone Social. What does Kelly Osbourne have to do with it?
© 2014 Microsoft