Plenty of celebrities have opened up about being bullied in school, but there are some stars like Tyra Banks and Russell Wilson who have admitted that they weren't so nice to their peers growing up.
Click through the gallery to see celebs who revealed they were bullies during their childhood.
"At nine years old, I was a bully. I was the mean girl: 'Oh you can't hang out with us' – I was that kinda girl who used to say that kind of stuff," she has said.
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Russell Wilson
"I was a bully growing up. In elementary and middle school, I threw kids against the wall. I rubbed their heads in the dirt at recess. I bit them. I even knocked teeth out," he has admitted.
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Ricky Martin
"When you're told you're wrong by everyone, from society, from your faith – my self-esteem was crushed. I took my anger out on those around me," he has said.
"I look back now and realize I would bully people who I knew were gay. I internalized homophobia… that was confronting to me. I wanted to get away from that."
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Sharon Osbourne
"I was a bully [in school] because I was so big. I felt insecure to all the other perfect girls, so I was at them before they started at me, as a defense," she reportedly said on The Talk.
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David Schwimmer
"I was always the class clown, I was the troublemaker in class. And I was always restless," David has said. "I was a bully. I was nearly expelled from junior high and elementary school before that."
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Ashley Rickards
"I've been both the bully and the bullied," the Awkward actress has said. "I remember there was this girl, her name was Jackie, and I hated the fact that she wore these rainbow socks. You know why? Because I wanted to wear them, I wanted to feel confident enough.. It came from a place of insecurity. And I was mean to her and I feel very bad. But it was because I was insecure and I was jealous.
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50 Cent
"I was [a bully] at different points during my childhood,” he has said. “I was dealing with my emotions the wrong way. From a child’s perspective, you don’t understand. As an adult, you get that’s not the way to deal with things.”
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Gabourey Sidibe
"I grew up in tougher neighborhoods, and I was bullied, but there have been times when I was a bully in order to defend myself," she has said. "I might have been a little overzealous sometimes, and I've been a bully. I think those two people — the bullied and the bully — live in all of us."
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Michelle Pfeiffer
"I was a rotten kid, just rotten. I was always in trouble. I tried so hard to be good, but I was incapable. Just incapable. With the greatest of effort, I would manage to get a C in citizenship. I was a bully," she has said.
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Jaime Primak Sullivan
"I was a bully in high school and it keeps me up at night," the Jersey Belle star has said.
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Jim Parrack
"Growing up, I made things very difficult on people around me at school. I was a jerk," the True Blood actor has admitted. "Looking back I can see that it was a very confusing time and I didn't know what to do with it, and somehow I had in my mind that if I could lash out at other people and hurt them I could somehow secure something for myself."
