Katherine HeiglActress Katherine Heigl is so close to her Grey's Anatomy co-star T.R. Knight, she has refused to get married without her "brother" by her side.

The Knocked Up star is to wed her fiance, singer Josh Kelley, later this year - but she was so adamant Knight was present at the ceremony she has planned her December 23 nuptials around his work schedule.

A source tells Us Weekly, "(Knight's) a brother and a best friend to her.

"She wouldn't get married without him."

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(This news article provided by World Entertainment News Network)


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