03/20/2012 03:16 am ET Updated May 19, 2012

January Jones Doesn't Reveal Any Juicy 'Mad Men' Secrets On 'Late Night With Jimmy Fallon' (VIDEO)

Considering how secretive Matthew Weiner, AMC and the entire cast have been about the long-awaited return of "Mad Men" this Sunday at 10 p.m. ET, it wasn't exactly a surprise that January Jones didn't reveal much of anything about what's in store for Betty Draper in Season 5 on "Late Night" (Weeknights, 12:37 a.m. ET on NBC).

She did laughingly reveal that Betty dies ... as everyone does ... at some point in the future. Luckily, she was charming, funny and delightful so Jimmy Fallon and the audience likely didn't mind. Besides, with a show like "Mad Men," it's more fun to simply watch it unfold on the screen with no idea what's coming around the next scene change.

January Jones returns for the Season 5 premiere of "Mad Men" on Sunday at 10 p.m. ET on AMC. Jimmy Fallon and "Late Night" are on every weeknight at 12:37 a.m. ET on NBC.

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