<P> Kari Väänänen portrayed Gollum (Finnish: Klonkku) in the 1993 live - action television miniseries Hobitit (The Hobbits) that was produced and broadcast by the Finnish network Yle . </P> <P> In Peter Jackson's The Lord of the Rings film trilogy, Gollum is a CGI character voiced and performed by actor Andy Serkis . He is smaller than both Frodo and Sam . Barely glimpsed in The Lord of the Rings: The Fellowship of the Ring (2001), he becomes a central character in The Lord of the Rings: The Two Towers (2002) and The Lord of the Rings: The Return of the King (2003). The CGI character was built around Serkis' facial features, voice, and acting choices . Serkis based the iconic "gollum" throat noise on the sound of his cat coughing up hairballs . Using a digital puppet created by Jason Schleifer and Bay Raitt at Weta Digital, animators created Gollum's performance using a mixture of motion capture data recorded from Serkis and the traditional animation process of Key frame, along with the laborious process of digitally rotoscoping Serkis' image and replacing it with the digital Gollum's in a technique coined rotoanimation . This work required a large number of digital artists . As in the animated depictions of the character, Gollum is shown as virtually naked save for a loincloth in the trilogy . </P> <P> In The Lord of the Rings: The Return of the King, Serkis himself appears in a flashback scene as Sméagol before his degeneration into Gollum . This scene was originally earmarked for The Two Towers, but was held back because the screenwriters felt audiences would relate better to the original Sméagol once they were more familiar with who he became . The decision to include this scene meant that Raitt and Jamie Beswarick had to redesign Gollum's face for the second and third movies so that it would more closely resemble Serkis' . The brief glimpses in The Lord of the Rings: The Fellowship of the Ring are of an earlier model of Gollum . </P> <P> In Jackson's films, Gollum has a split personality: the childlike "Sméagol" and the evil "Gollum". Screenwriters Fran Walsh and Philippa Boyens included scenes in The Two Towers, The Return of the King and An Unexpected Journey in which "Gollum" and "Sméagol" argue, with Serkis slightly altering his voice and body language to play the two as separate entities . His dual personality was also emphasized by different pupil dilation--"Gollum" has small, piercing pupils and "Sméagol" larger, noticeably dilated pupils--and by positioning the two on different sides of the screen . </P>

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