WATCH: Will Ferrell Returns To Host 'SNL'

Will Ferrell hosted Saturday Night Live's penultimate show of its 37th season on Saturday, with musical guest Usher, and reprised some of his classic impressions, including that of George W. Bush.

After Barack Obama's gay marriage announcement, Ferrell as "George W. Bush" showed up as Joe Biden's (Jason Sudeikis') "imaginary friend," who has been living in his closet.

"You know, everyone thinks you're a figment of my imagination," said Sudeikis-as-Biden on the SNL episode as he drank an O'Doul's non-alcoholic beer with Ferrell-as-Bush. "Well, for some people that's just easier than accepting the truth ... I've been stuck here living in your closet for the past three-and-a-half years.

Ana Gasteyer and Fred Armisen also returned for Ferrell's hosting stint.

Watch the SNL sketch here:

For more on Will Ferrell and Saturday Night Live:

Will Ferrell Announces 'Anchorman' Sequel

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Will Ferrell Will Host 'SNL' With Musical Guest Usher

Will Ferrell Helps Beastie Boys Promote 'Fight For Your Right — Revisited'