‘Salmon Fishing in the Yemen’ premiere

Costars Emily Blunt and Ewan McGregor reunited on the red carpet on Monday to celebrate the opening of "Salmon Fishing in the Yemen."

Costars Emily Blunt and Ewan McGregor reunited on the red carpet on Monday to celebrate the opening of “Salmon Fishing in the Yemen.”  (Chris Pizzello / Associated Press)

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Ewan McGregor, posing with his wife Eve Mavrakis, plays a fisheries expert named Dr. Alfred Jones who is asked to bring fly fishing to the desert.

Ewan McGregor, posing with his wife Eve Mavrakis, plays a fisheries expert named Dr. Alfred Jones who is asked to bring fly fishing to the desert.  (Jason Merritt / Getty Images)

Emily Blunt is Harriet, a consultant who helps Dr. Jones along the way.

Emily Blunt is Harriet, a consultant who helps Dr. Jones along the way.  (Alberto E. Rodriguez / Getty Images)

"Harry Potter" star Tom Felton.

“Harry Potter” star Tom Felton.  (Alberto E. Rodriguez / Getty Images)

"Sucker Punch" actress Jamie Chung.

“Sucker Punch” actress Jamie Chung.  (Alberto E. Rodriguez / Getty Images)

From left, Viacom executive chairman Sumner Redstone, Blunt, CBS president and CEO Leslie Moonves and McGregor.

From left, Viacom executive chairman Sumner Redstone, Blunt, CBS president and CEO Leslie Moonves and McGregor.  (Chris Pizzello / Associated Press)