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Jon Hamm and his longtime love Jennifer Westfeldt make their way into the Ed Sullivan Theatre to pre-tape his appearance on The Late Show with David Letterman on Thursday (April 25) in New York City.

The 42-year-old Mad Men actor’s appearance won’t air until Friday night’s episode.

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Jim Parsons, Snoop Lion, and legendary football player Barry Sanders were all spotted heading into the studio to tape that evening’s show.

JJ Fun Fact: Standing behind Barry, you may notice his manager J.B. Bernstein, who Jon happens to be playing in the upcoming movie Million Dollar Arm!

15+ pictures inside of Jon Hamm and Jim Parsons heading into the Letterman studio… More Here! »

Jon Hamm attends the opening night performance of Bette Midler‘s new one-woman Broadway play I’ll Eat You Last: A Chat with Sue Mengers on Wednesday (April 24) at the Booth Theatre in New York City.

The 42-year-old actor was joined by his longtime love Jennifer Westfeldt, Jack Huston with his aunt Anjelica Huston, Glenn Close, Kathy Griffin, and Susan Sarandon.

In I’ll Eat You Last, Bette plays Sue Mengers, the agent whose clients were the talk of the town, and her dinner parties were the envy of Hollywood. Now, you’re invited into her glamorous Beverly Hills home for an evening of dish, dirty secrets and all the inside showbiz details only Sue can tell you.

We caught the show at a performance earlier this month and it is a show not to be missed, especially for those who love showbiz like we do. Grab tickets while you can at Telecharge.com!

20+ pictures inside of Jon Hamm and Bette Midler at the I’ll Eat You Last opening… More Here! »

January Jones rocks denim while attending a presentation for her hit show Mad Men at The Paley Center for Media on Tuesday (April 23) in New York City.

The 35-year-old actress was joined by her co-stars Jon Hamm, Vincent Kartheiser, Kiernan Shipka, John Slattery, and Jessica Pare.

PHOTOS: Check out the latest pics of January Jones

The day before, the Mad Men cast attended a BAFTA panel for the show in the Big Apple.

Also pictured: Jon donning a “Hi” t-shirt while filling up his gas tank on Saturday (April 20) in Los Feliz, Calif.

FYI: January is wearing a Zara blouse, Textile by Elizabeth and James jacket, Helmet Lang pants, Christian Louboutin shoes, Marni bag, and IDC earrings.

40+ pictures inside of January Jones and Jon Hamm attending a Mad Men presentation… More Here! »

January Jones keeps it chic while attending the BAFTA panel and reception for her hit show Mad Men held at the Harvard Club on Monday (April 22) in New York City.

The 35-year-old actress was joined by her co-stars Christina Hendricks, Jon Hamm, Vincent Kartheiser, Kiernan Shipka, John Slattery, and Jessica Pare.

PHOTOS: Check out the latest pics of January Jones

On the same day, January was spotted promoting the show on Late Night with Jimmy Fallon, while Christina rocked sunglasses during a stroll in the Big Apple.

FYI: January is wearing a Versace jacket, Parker skirt, and Miu Miu shoes at the BAFTA panel. She wore a Parker top, Jbrand leather pants, and Dolce&Gabbana shoes for her Late Night with Jimmy Fallon appearance.

30+ pictures inside of January Jones and Christina Hendricks promoting Mad Men… More Here! »

January Jones and Christina Hendricks make their entrances into the studio to tape an appearance on Katie on Monday (April 22) in New York City.

The ladies were joined by their Mad Men castmates Jon Hamm, Vincent Kartheiser, Kiernan Shipka, and Jessica Pare for the talk show appearance.

The day before, January was spotted at LAX Airport catching a flight from Los Angeles to the Big Apple.

Later this evening, the cast will be attending a BAFTA NY screening of their show.

FYI: January is wearing the TEXTILE Elizabeth and James Sid Jacket while heading into the Katie studios.

20+ pictures inside of the Mad Men cast visiting Katie… More Here! »

Jon Hamm keeps a low profile as he heads to a lunch meeting on Friday afternoon (April 19) in Los Angeles.

The day before, the 42-year-old Mad Men star was spotted leaving Matsuhisa restaurant after grabbing some dinner with a friend in Beverly Hills.

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It was recently announced that Life of Pi actor Suraj Sharma has joined Jon in the upcoming Disney baseball drama Million Dollar Arm, according to THR.

10+ pictures inside of Jon Hamm out and about… More Here! »

Jon Hamm wears a leash around his neck while walking his pet pooch on Saturday (April 13) in Los Feliz, Calif.

Last weekend, the 42-year-old actor and his partner Jennifer Westfeldt were spotted holding hands while taking a stroll with the dog.

PHOTOS: Check out the latest pics of Jon Hamm

It was recently announced that Alan Arkin has the joined the cast of Jon‘s upcoming film Million Dollar Arm, which will start shooting next month in Atlanta. Jon is playing sports agent J.B. Bernstein.

10+ pictures inside of Jon Hamm walking his dog with a leash… More Here! »