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06/27/2013 02:41 pm ET

Laura Prepon: How Wilmer Valderrama Ruined Takes On 'That '70s Show' (VIDEO)

Turns out Wilmer Valderrama is even more hysterical in real life than he is as Fez, according to his "That '70s Show" co-star Laura Prepon.

"My director would never put [Wilmer] next to me in scenes," said Prepon, who played Donna Pinciotti, while speaking with HuffPost Live's Josh Zepps earlier this week.

"He would make me laugh so hard that it would literally ruin takes," she continued, reminiscing about how her director would have to separate the two of them on set.

Prepon stars as an international drug dealer in Netflix's new show "Orange Is The New Black," premiering July 11.

For more on her career, both past and present, watch the full HuffPost Live segment below:

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