Oprah Winfrey says she is "euphoric" over Barack Obama clinching the Democratic presidential nomination.
"I've been doing the happy dance all day," she tells Entertainment Tonight.
Winfrey, 54, has been a staunch supporter of Obama from the beginning of his campaign.
(See photos of other stars on the campaign trail.)
"I'm so proud of Barack and [his wife and upcoming View co-host] Michelle Obama and what this means for all of us ... the new possibilities for our country," Winfrey says.
The talk show host says she's willing to do whatever it takes to get her candidate elected.
"If he wants me to," she says, "I'm ready to go door to door."