Even in the 1970s, Thurston Hall was ripe for love – and home to what could be GW’s biggest power couple ever.

Actor Alec Baldwin dated liberal commentator Hilary Rosen when they lived across the hall from each other in GW’s largest freshman residence hall, this month’s Vanity Fair cover story on the “30 Rock” star revealed.

Baldwin, who attended GW from 1976 to 1979, transferred to attend New York University’s undergraduate drama school.

Rosen, former CEO of the lobbying group Recording Industry Association of America, earned her bachelor’s degree in international business from GW.

“He was passionate about politics,” Rosen told Vanity Fair. “He was funny — and I won’t say he was lighthearted, because he was always ambitious; he always wanted to have an impact and be in the thick of things.”

But the couple’s future together was for naught.

Baldwin, 54, married 28-year-old yoga instructor Hilaria Thomas on Saturday. Rosen, 53, later came out as lesbian.

“He is better off with Hilaria,” Rosen told The Washington Post in an email. “Very happy for him!”

Rosen was last in the spotlight when she said in April that Anne Romney, wife of the likely Republican presidential nominee, had “never worked a day in her life.”