David Letterman

You don’t have to wait until later tonight to begin saying goodbye to David Letterman (though if you’re like us, you’ve already started that process) — you can do it right now. The venerable, longtime Late Show host is ending his 33-year run with tonight’s episode, which promises to be a fantastic, hilarious and appropriately heartwarming sendoff. But before we get to that, you can watch Letterman’s final Late Show entrance right now.

Tonight is the end of an era in multiple ways. Tonight, America says one final "good night" to David Letterman.

With David Letterman departing The Late Show to make way for Stephen Colbert, the entire world waits with bated breath to see what this living legend will do after his final episode airs this May. Thankfully, we have people like Billy Eichner around to accost strangers and collect suggestions for what he should do next.

Alert, alert: Will Smith still has it. The star of the upcoming con man romantic comedy drama (co-ma rom-com-dram?) Focus hit The Late Show last night to chat it up with host David Letterman and, oh, yeah, to just randomly rap “Gettin Jiggy Wit It” alongside Letterman’s own band. Sure, most late night guests just walk out on stage, give a big hello, and sit down, but not Smith, who seemed determined to remind everyone of his rap roots.

Well...not really. But, David Letterman couldn't help but bust Oscar Isaac's chops.

‘The Colbert Report’ has already said its goodbyes, while David Letterman will hang onto the ‘Late Show’ until May, so when does Stephen Colbert finally take the desk, and begin our new era of ‘Late Show with Stephen Colbert?’ Find out, as CBS has released the official start date, and teased some specials from Letterman himself!

Stephen Colbert has already begun making the final rounds of ‘The Colbert Report’ in preparation for his new CBS ‘Late Show’ hosting gig, but don’t expect David Letterman to vacate the chair just yet. The longest-running late-night host has officially set a departure date for May 2015, bringing an end to ‘The Late Show with David Letterman’ as we know it.

Ben Stiller has accomplished a lot in his life -- this is the guy who created 'Zoolander,' after all -- but his dearest memory might just be a very unexpected one: that time he survived a hot air balloon ride. Said ride wasn't conceived of as a daredevil experiment, it was actually a fun part of a Stiller family vacation in Italy. It was supposed to be a good experience!

Often, particularly colorful characters take to the various late shows to flex the full range of their unique spirit, just for funsies. Joaquin Phoenix looked to be going down that precise path on last night's 'Late Show,' actively imitating himself learning yoga, calling his more personal bits "Julio Igelasias," and just generally having a good time. Host David Letterman looked nervous, but Phoenix looked relaxed, and that might be why Phoenix's good-time appearance took a serious turn when the 'Inherent Vice' star announced his engagement on air.

Here is a brief list of things that happened during Jennifer Lawrence's appearance on 'The Late Show' last night: she sang with host David Letterman, the duo discussed tummy troubles, they chatted about bowling, they both totally biffed introducing a clip, Lawrence begged Letterman to not retire, they walked out during a live taping, and then Lawrence took over the entire show.