Gary Oldman loves 'Downton Abbey'.

Gary Oldman

Gary Oldman

The 'Tinker Tailor Soldier Spy' actor left his "biggest fan" Michelle Dockery starstruck when he approached her to tell her how much he enjoys watching her show.

Asked which celebrity fans have impressed her, she told Look magazine: "Gary Oldman. It was an event in New York and I was standing there with Laura Carmichael [who plays Lady Edith] and he strode over and just launched into how much he loved the show.

"That was amazing, as I'm his biggest fan ever."

The 'Harry Potter' actor isn't the only Hollywood star to stun the cast with his fandom.

Phyllis Logan - who plays head housekeeper Elsie Hughes on the show - couldn't believe it when Johnny Depp recognised her when she went to visit her husband Kevin McNally on the set of the latest 'Pirates of the Caribbean' movie.

She said recently: "My husband was recently filming the fifth 'Pirates of the Caribbean' film with Johnny Depp and he said, 'What was it I saw you in once... Oh you were in 'Downton Abbey', I love that show.'

"His favourite characters were Mr. Carson and Daisy!"