Watch Casey Knowles on American Morning Monday.

(CNN) — Casey Knowles has graced the airwaves this month as the unwitting star of a headline-grabbing campaign ad for Hillary Clinton. But the 17-year-old is hoping to grace the small screen this campaign year for another presidential hopefully: Clinton’s Democratic rival, Barack Obama.

Stock footage of an 8-year-old Knowles sleeping – shot when she worked as an extra in TV commercials — was used in Clinton’s “red phone” ad, which asked “Who do you want answering the phone at 3 a.m.?” in the case of a foreign policy crisis.

But the high-school senior – who will be eligible to vote in the general election – is actually a passionate supporter of Barack Obama’s, and has been volunteering for the Illinois senator’s campaign.

“I think it would be wonderful if Barack Obama and I could get together and do a counter-ad,” she told CNN Saturday.

Appearing on CNN's American Morning Monday, Knowles said she was shocked to discover she was in the commercial, and said it made her feel disloyal to Obama.

"It makes me feel a little disloyal and kind of," she said. "It hurts that footage of me would contribute to a candidate that I'm not necessarily supporting. Hopefully Mr. Obama would forgive me. "

Knowles, who lives in Washington State, also said she plans on helping Obama in Oregon ahead of that state's primary in May.

"They want to get me down there and hopefully get me to help support and get campaigning going on down there," she said.

In Wyoming on Friday, Obama told voters at a campaign event that people shouldn’t worry about what he’d do if an emergency 3 a.m. call came into the White House when he was president.

“What do people think I’m going to do? I’m going to answer the phone,” he said.