Figwit is seen in the first movie during the council of Elrond. He sits next to Aragorn until they all stand up to argue. After Frodo shouts "I will take it!" and everyone turns and looks at him, Figwit is standing on the far right. He is standing in the backround for only a fraction of a second; a main part of the joke is that the actor is just a minor extra.
Figwit is also seen in the third movie in the scene where Arwen is leaving for the Grey Havens and has the vision about her future son Eldarion. Figwit is the one that tells her to get back with the others. His exact words: "Lady Arwen, we cannot delay!" and then "My lady!".
Figwit's rise to fame began shortly after the first movie, and some fans believe he was given dialog in the third movie because Peter Jackson was aware of the attention given to this extra. Jackson mentions the phenomenon in the commentary track on the extended version of the Return of the King DVD: "the decision to give him a speaking role was developed after the scene was scripted. Originally just a random cast extra was to give the lines, but it was decided that it would be fun if the Figwit actor was brought in to deliver them."
Figwit does not appear in any of the books and was created exclusively by Peter Jackson. Because of this, there is no authentic information regarding Figwit, save that he was an escort (Peter Jackson never even officially used the name "Figwit" nor does that name actually appear in the film credits or other official material). He is a popular subject in slash fiction and (to a lesser extent) as a sex symbol. Figwit's card in The Lord of the Rings collectable card game gives his name as Aegnor, a name derived from The Silmarillion, but there used for another character.
In 2004 a 50 minute documentary on the Figwit phenomenon "Frodo is great... Who is that?!!"  was made by three Wellington filmmakers Stan Alley, Nick Booth and Hannah Clarke - all of whom worked on the Lord of the Rings trilogy. The documentary follows Bret McKenzie to the Edinburgh where he meets the fans of his trademark pout and "elvish good looks" and features extensive interviews with fans behind various Figwit fan sites as well as Peter Jackson, Barry Osbourne, Mark Ordesky, Ian McKellen and other cast members.