TLC is suing Jon Gosselin for breach of contract, and the network -- which produces 'Jon & Kate Plus 8' -- is calling upon his maybe-girlfriend Hailey Glassman and his celebrity BFF Michael Lohan to be their witnesses, reports.

Lawyers for TLC will depose Glassman and Lohan, along with Gosselin's bodyguard, his lawyer Mark Heller and others in their case against the Octo-Dad.