WORCESTER - Jon Hamm strolled through the front doors of the Mercantile Center in downtown Worcester about 8 a.m. Tuesday.

Actor John Slattery, best known for his roles in the Marvel Cinematic Universe and the Emmy-winning series Mad Men, has joined the cast of the upcoming USA Network series The Rainmaker.

Mariska Hargitay, Christopher Meloni recall 'Law & Order: SVU' audition Mariska Hargitay said she mistook Christopher Meloni for John Slattery at their "Law & Order: SVU" audition. Justin Bieber ...

Slattery played politician Bill Kelley in the beloved HBO show. John Slattery chats with ET about reuniting with Jon Hamm for 'Maggie Moore(s),' out in theaters on June 16. ‘Confess, Fletch ...