Roll out the welcome wagon and dust off that old "Lazy Scranton" video, because there's a newbie joining Dunder Mifflin. Ferrell will appear in four episodes of the NBC sitcom as Michael Scott's replacement. Ferrell describes Vickers as a "more squared-away version" of the paper company's longtime leader… whatever that means.

We're not sure how to put this, but Channel 4 news anchor Ron Burgundy is kind of a big deal. The 2004 comedy is one of Ferrell's most quoted comedies, thanks to a hilarious supporting cast (including The Office's Steve Carell) and precious gems like "You stay classy, San Diego" that only Ferrell could pull off (nice try, Katie Couric). No, seriously, don't act like you're not impressed.

Combine SNL, his Broadway play You're Welcome America and the subsequent HBO special from the play, and Bush is one of Ferrell's longest-running impersonations. Not only did he perfect the president's mannerisms and Southern drawl, he also made it OK for America to laugh about war and terrorism in a post-9/11 world. "Unlike those frustrating Waldo books, I'm going to find you," he threatened Osama Bin Laden.

No one likes a surprise visit from the landlord, especially when she's an expletive-yelling, beer-guzzling 2-year-old, as was the case in Funny or Die's 2007 video. In the two-minute clip, Pearl threatens to smack Ferrell and put him out on the streets when he fails to come up with the money.

Ferrell shared the big screen with Office cohort Jenna Fischer in this 2007 comedy. After a far fall from grace, Ferrell's sex-addicted, cocky figure skater must pair up with Jon Heder to return to glory. Bonus points to Ferrell for sporting those very tight, very Bedazzled skating outfits.

As the droll, long-suffering host of Jeopardy, Ferrell's stone-cold expressions of frustration, disbelief and absolute boredom made the stupidity of the celebrity contestants that much more hilarious, especially when it came to his celebrity arch nemesis, Sean Connery.

This retro-basketball comedy is one of Ferrell's only period comedies, and the actor takes full advantage of the '70s setting to feature his curly locks in a larger-than-life 'fro.

As the star of the fictional NBC action-drama B---- Hunter, Ferrell got to carry around heavy artillery and let out his more aggressive side, all while wearing some pretty sweet aviator sunglasses. The downside? No shared screen time with former SNL co-star Tina Fey (yet).

Pop culture fans will forever associate Ferrell and co-star Chris Kattan's signature head-bobbing with Haddaway's infectious dance jam "What is Love," thanks to this popular SNL sketch-turned-film.

As a dimwitted race car driver, Ferrell and co-star John C. Reilly made the term "Shake and Bake" so much cooler than just chicken breading in a box. The film's other memorable catchphrase comes when Ferrell is running around the race track after a crash in his underwear, shouting, "Help me, Jesus! Help me, Jewish God! Help me, Tom Cruise!"

At first glance, most people wouldn't equate a used car dealership in North Carolina with caviar, champagne and fine furs, but that's just the kind of sleazy car dealer Schaeffer is. However, whatever class points he racks up, he quickly loses with this offensive selling point: "You gotta be borderline retarded to shop anywhere else."

"Buddy the Elf, what's your favorite color?" With a knack for paper snowflakes, a constant craving for sweets and an affinity for elf culture, Buddy is probably Ferrell's most kid-friendly role to date. Fortunately, the character's wide-eyed enthusiasm for pretty much everything (even gum found on a New York City street) is truly endearing.

As one-half of Spartan High's perkiest pep squad, Ferrell and co-star Cheri Oteri took the term "lovable loser" to new heights, as rejected cheerleaders who simply couldn't hold back their inner spunk and squeaky clean morals. "Funky Cold Medina," anyone?

Oh, Frank the Tank. Once that first beer bong hit his lips, it was all downhill from there. One minute, he's spending a nice little Saturday at the Home Depot and Bed, Bath and Beyond with his wife, and the next, he's running stark naked through town in the middle of the night and drunkenly begging to go to KFC. Ferrell (and Snoop-a-loop and his green hat) helped make the comedy a classic.

His primary role in this Molly Shannon comedy was that of on-screen love interest Sky Corrigan, but it's hard to best Ferrell's brief appearance in the holy robes and a long-haired wig as Jesus. Especially when he advised Mary Catherine Gallagher to "get jiggy with it" and broke out a few verses from the 1997 Will Smith hit.

Of his many on-screen alter egos, Ferrell's villainous fashion designer in this 2001 comedy was one of the craziest (and not just because of that hair). In his effort to get child labor laws dismissed, Mugatu attempted to impress Zoolander with his "center for ants" and almost brainwashed him into murdering the Prime Minister of Malaysia. Alas, Mugatu was no match for "Blue Steel."

We've got a fever, and the only prescription is more of Ferrell as Blue Oyster Cult's cowbell player Gene Frenkle. It only took one episode of SNL, and the particularly deadpan performance of host Christopher Walken, to send “A little more cowbell?” straight into the lexicon.