The Office will wrap up its seventh season on Thursday, May 19, when we will finally discover who Michael Scott's (Steve Carell) Dunder Mifflin replacement is. NBC is lining up some high-profile guest stars such as Will Arnett and the creator of the original BBC version of The Office, Ricky Gervais.

Ricky Gervais will be making his second appearance on the American version of The Office, while Will Arnett will appear for the first time on the NBC comedy. The finale episode is still being written, so it isn't known how Ricky Gervais and Will Arnett will be involved yet. The network is also lining up several other notable guest stars for this finale.

We reported earlier this month that Steve Carell's last episode of The Office will air on April 28. Will Ferrell will have a four-episode arc as a temporary replacement for Michael Scott, which starts on April 14 and ends on May 5.

The Season 7 finale on May 19 will be an hour-long episode. We also reported last week that The Office is renewed for an eighth season starting next fall.