Stephen Colbert, Jon Stewart

Stephen Colbert, left, seen her with Jon Stewart at Comedy Central's 'Night Of Too Many Stars: An Overbooked Concert For Autism Education' at the Beacon Theatre in New York on Oct. 2, 2010.

(AP file photo)

Former "Daily Show" host Jon Stewart will appear on Monday night's "The Late Show with Stephen Colbert" to assist his one-time colleague in coverage of the Republican National Convention.

Colbert was a regular on "The Daily Show" from 1995 to 2005 before leaving to host his own Stewart produced series, "The Colbert Report." Stewart is also one of the executive producers of "The Late Show with Stephen Colbert"

It has not been revealed what role Stewart will play on the CBS late night show or from where he will appear, UPI reported.

Colbert's show is expected to have an on-site presence in Cleveland with Colbert likely to remain at the Ed Sullivan Theater in New York City studio.

Monday's night's show will be broadcast live to allow Colbert and his staff to comment on the day's events, according to CNN.

It's unknown whether Stewart will appear during Colbert's coverage of the Democratic National Convention in Philadelphia the following week.