Actress 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)