NEW YORK — Stephen Colbert has scored a fairly major guest for one of the final episodes of “The Colbert Report”: President Barack Obama will appear on the show on Monday.

Colbert will be in Washington to tape a special episode he’s calling “Stephen Colbert Presents: Mr. Colbert Goes to Washington D.C. Ya Later, Legislator; Partisan is Such Sweet Sorrow: A Colbert Victory Lap.”

The show is being filmed at George Washington University, is open to students only and yes, it’s already sold out. Colbert urged everyone to reserve a seat in their own living rooms, now.

“Nation, I cannot overstate how huge this is,” Colbert said when he made the announcement on Thursday night’s show. “The size of the hugeness? Large. I am so honored to be sitting down with the man who sat down with Bill O’Reilly.”

This will be Obama’s third visit to the show; he last appeared in in 2009. “The Colbert Report” wraps up for good on Dec. 18.