HBO will air a tribute episode to "The Sopranos" star James Gandolfini, according to Variety.

The episode, titled "James Gandolfini: Tribute to a Friend," will feature clips of Gandolfini's work, behind-the-scenes footage, and more than two dozen of his friends and colleagues will be featured, probably sharing memories and talking about the relationships they had with the late actor.

"James Gandolfini: Tribute to a Friend" is slated to air on Sunday, Dec. 22 at 8:30 p.m. ET.

Gandolfini died on June 19, 2013 of a heart attack. He was 51 years old.

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