US television chat show Queens Oprah Winfrey and Barbara Walters are locked in a fierce bidding war to secure royal sister Pippa Middleton as a guest, says a British tabloid.
The younger sister of Catherine, Duchess of Cambridge, has achieved global stardom since her appearance at her sibling's royal wedding in April.
The Sunday Mirror newspaper reported that fees of up to $445,864 have been offered for Pippa to be interviewed in the US as she starts on the promotion trail for her upcoming book about how to host a perfect party.
While Oprah is said to have told her network executives to "pull out all the stops" to secure the 28-year old, ABC TV legend Walters is said to be pushing bosses to offer a six-figure deal.
"The big guns see Pippa as the big-name interview of 2012," a US TV analyst told the Mirror.
Any fee paid for Pippa's television appearance will be donated to charity, the report said.