When it comes to the "Mad Men" cast, who is the best dancer? Most idealistic? Most innocent?

In a broadcast-exclusive interview, the stars of AMC's "Mad Men" joined creator Matthew Weiner and ABC News' Diane Sawyer in outing one another on their behind-the-scenes secret talents.

Can Jon Hamm sing? Watch the video above and find out.

Want more? Find out what had the cast cracking up before the interview.

With 15 Emmys and four Golden Globes under its belt, "Mad Men" enters its seventh - and final - season Sunday with part one.

The broadcast-exclusive interview airs Thursday on " World News with Diane Sawyer" at 6:30 p.m. ET and " Nightline" at 12:35 a.m. ET and then Friday on " Good Morning America" on ABC and on " AM Tonight" at 9:00 p.m. ET on Fusion.

Excerpts will also be featured on ABC News Digital, ABC News Radio and ABC NewsOne.

Check back Wednesday for more exclusive clips from the interview.