These actresses aren’t just knockouts, they can actually knock you out.
RadarOnline.com has compiled a list of Hollywood women who keep in shape through some good old-fashion' fisticuffs.
Whether taking up boxing or practicing Budokon – a fusion workout featuring plenty of punches -- these femme fatales maintain their fine figures by learning how to kick butt.
Click through to witness the results of their workouts.
Jess credits boxing with changing her life! She tweeted: “I have so much energy and it has cured my insomnia.”
See more of the buxom blonde here and check out these bikini photos of fellow singer/actress Leighton Meester.
'The Hills'' starlet calls kick boxing a “full body workout” that is “really fun.”
Mrs. Lamar Odom credits boxing, which she says she does “three days a week,” for helping her lose 20 pounds.
See more of a svelte Khloe here and spend some time with this RadarOnline.com gallery of other hot bikini bodies of reality television.
J.Lo got into top fighting form for 'Enough' by practicing Krav Maga, which she says is not just about hand-to-hand combat but “about finding the power within yourself.”
Hilary’s Oscar-winning turn as a boxer gave her respect for the practice she likens to “a great game of chess” that teaches you about “your own strength and weaknesses.”
Ms. Moore, who once dated a martial arts instructor, underwent serious karate training for her role in the 'Charlie’s Angels' sequel.
Check out these hot bikini shots of Demi on RadarOnline.com and take a look at more bikini photos of the hottest married women in Hollywood.
Courteney calls Budokon, which blends yoga and martial arts, “an unbeatable combination” for getting fit.
Check out more photos of Courteney at RadarOnline.com and take a look at these bikini photos of her friend Jennifer Aniston!
Jen has done years of martial arts training thanks to her turn as a spy in 'Alias' and as an international assassin in 'Elektra.'
Check out more of the brunette beauty here and see other athletic goddesses in this RadarOnline.com gallery of the hottest women in sports.
The Victoria’s Secret model says boxing is her “favorite thing to do” since “you build up muscles without being too big.”
See more of the stunning Lima here and in this gallery of RadarOnline.com’s sexy Victoria’s Secret Angel Hall of Fame!
Sandy has revealed her L.A. slim-down routine: “I do a lot of Pilates, kick boxing and weight training in L.A. and when I’m in Austin I run or ride a bike.”
Click here for more photos of sexy Sandra and take a gander at these RadarOnline.com hot bikini photos of fellow Golden Globe nominee Penelope Cruz.
Don't mess with these hard-hitting Hollywood actresses.