January Jones: Sheer Top at 'Sweetwater' Sundance Premiere!

January Jones goes sheer on the red carpet at the premiere of her film Sweetwater during the 2013 Sundance Film Festival on Thursday (January 24) at the Eccles Center Theatre in Park City, Utah.

The 35-year-old actress was joined at the premiere by her co-star Jason Isaacs.

Earlier in the week, January and Jason participated in a portrait session together to promote the flick.

Also pictured: January‘s Mad Men on-screen daughter Kiernan Shipka attending the Elle Women in Television Celebration that same evening at the Soho House in West Hollywood, Calif.

FYI: Kiernan is wearing an Oscar de la Renta dress, Rupert Sanderson shoes, and Kwiat jewels.