TV icon Oprah Winfrey left her longtime best friend Gayle King flabbergasted after surprising her with a huge 70th birthday bash. The big reveal was captured on camera and posted to Winfrey's Instagram. King, her mouth agape, clutches her chest and freezes -- completely astonished. The camera pans to show a room filled to the brim with King's loved ones. "My bestie of 50 years is turning 70 so we gathered everyone that loved her to celebrate," Winfrey captioned the post. "Hard thing to surprise her, O the stories we have made up, the lies we have told to keep this a secret. Happy birthday @gayleking, sorry we almost gave you a heart attack." Winfrey and King, both successful media personalities, have been dear friends since they met as young journalists at Baltimore's WJZ television station. When Winfrey celebrated her own 70th birthday a year earlier, she said, "No day is promised to any of us. So to reach this major milestone feels like grace in action."