Katherine Heigl, T.R. Knight exiting 'Grey's'?

ABC has no comment on report

Katherine Heigl and T.R. Knight may be exiting ABC's highly rated "Grey's Anatomy."

US Magazine reported that co-star James Pickens Jr. confirmed both actors were leaving the medical drama.

ABC did not comment on the report.

Knight has said he wants out of his contract, while Heigl has a film career and has expressed dissatisfaction with her character's story lines.