Before game one of this year's World Series between the New York Yankees and the Philadelphia Phillies, Jill Biden strode out onto the field at Yankee Stadium to participate in a pre-game ceremony honoring America's veterans.
The vice president's wife, walking alongside first lady Michelle Obama and Yankees legend Yogi Berra, sported a maroon jacket with "World Series" emblazoned across the chest -- appropriately neutral attire to avoid a Bronx cheer from the Yankees fans, given Biden's status as a diehard fan of the Philadelphia Phillies.
She may be better known as the college professor wife of the Vice President Joe Biden, an advocate for military families and a staple on the campaign trail last year, but now that the Fall Classic is underway, Jill Biden may become known as the biggest, most loyal Phillies fan.
Her husband declared her the Phillies' "most rabid," fan and he knows firsthand how deep her loyalty runs.
Last year, Biden logged thousands of miles on the campaign trail with her husband, but with just six days to go before Election Day, the potential for a World Series title lured her back to her hometown.
"I gotta tell ya, my wife, I'm on the campaign trail, she says, 'Joe, I'm going to the Series.'" then-Sen. Joe Biden said of his wife's decision to go home and watch her team.
On Oct. 29, 2008, after anxiously waiting out a two-day rain delay, Biden and her granddaughter Maisy joined 45,000 towel-waving fans in South Philadelphia to watch in person as her Phillies beat the Tampa Bay Rays to win Major League Baseball's championship.
The World Series title was just the second for the Phillies franchise and ended a 26-year championship drought in that sports-obsessed city.
The vice president's wife told ABC News it was "exciting" to be there when her team won the title. Last year she called that night "one of the best nights" of the campaign.
Biden, a native of Willow Grove, Pa., a Philadelphia suburb, said she's always been a fan of her hometown sports teams and counts watching Phillies games with her father on summer nights as some of her greatest memories.
"I was a little girl," she told ABC News, recalling watching games on the family's black and white Philco TV. "It was a great father/daughter memory for me."
Her favorite current Phillie is all-star shortstop and form National League MVP Jimmy Rollins. On the eve of the election last year, Rollins joined the Bidens at a rally in South Philadelphia, just days after the Phillies won the World Series.
The shortstop revved up a crowd of over 2000 at Marconi Plaza and presented then-Sen. Joe Biden with a Phillies home jersey with "Biden 08" on the back.
"I will never forget the night before the election last year we were at an 11 p.m. rally in Philadelphia, [Rollins] introduced me," Biden said. "He was for our team, our ticket, in the icy cold. It was so great, there was so much excitement in the air."
After Rollins gave his endorsement to the Obama/Biden ticket, Jill Biden took the stage sporting a red Phillies warm-up jacket and waving a white Phillies towel.
"One of the best nights of this campaign was watching the Phillies win the series," she told the crowd that night as she introduced her husband.
"This woman bleeds red," her husband said as he took the mic.