LOS ANGELES (AP) — Marc Maron is locking the gates on his podcast Monday after 16 years and more than 1,600 episodes.

The final episode of “WTF With Marc Maron” is expected to drop in the morning, but its contents, and the identity of his last interview guest (or guests) remains a mystery.

In his penultimate episode on Thursday, the 62-year-old Maron said it was his last from his home studio, but said nothing else about who might show up for his swan song.

Maron's guests are rarely if ever announced in advance. Fans have been fervently speculating about who they might hear Monday. Could it be an entertainment giant making their first appearance? ( Bob Dylan?Taylor Swift? ) A more personal choice? (An old friend? His parents?) A reprise of a previous major guest? ( Barack Obama? ) Maybe

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