Gayle King -- Following the Leader...

11/20/2009 4:45 PM PST BY TMZ STAFF
Gayle King's reaction to Oprah calling it quits in 2011 was simple: "If she's happy, I'm happy for her."

Gayle King: Click to watch
O's BFF was in NYC today, where she made it clear that even after Oprah's off the air she "can't be replaced."

And just like O, Gayle also threw out a shameless plug -- making sure to promo what time Oprah airs in NYC.