Hayden Panettiere through the years

Hayden Panettiere participates in the BUILD Speaker Series to discuss the television series "Nashville" at AOL Studios on Thursday, Jan. 5, 2017, in New York.

Hayden Panettiere appears on Amazon's Style Code Live on Jan. 4, 2017 in New York City.

Hayden Panettiere performs during "Nashville for Africa," a Benefit for the African Children's Choir at the Ryman Auditorium on Feb. 15, 2016 in Nashville, Tennessee.

Hayden Panettiere attends the 21st Annual Critics' Choice Awards at Barker Hangar on January 17, 2016 in Santa Monica, California.

Hayden Panettiere attends the 66th Annual Primetime Emmy Awards held at Nokia Theatre L.A. Live on August 25, 2014 in Los Angeles, California.

Hayden Panettiere attends the 'Charles James: Beyond Fashion' Costume Institute Gala at the Metropolitan Museum of Art on May 5, 2014 in New York City.

Hayden Panettiere attends HBO's Post 2014 Golden Globe Awards Party held at Circa 55 Restaurant on Jan. 12, 2014 in Los Angeles, California.

Wladimir Klitschko and Hayden Panettiere attend the Entertainment Weekly & ABC-TV Upfronts Party at The General in New York City on May 14, 2013.

Actress/model Hayden Panettiere attends the 34th Annual Sports Emmy Awards Reception at Frederick P. Rose Hall, Jazz at Lincoln Center in New York City on May 7, 2013.

Actress Hayden Panettiere watches the Miami Heat play against the Charlotte Bobcats at the American Airlines Arena in Miami, Florida on March 24, 2013.

Hayden Panettiere at the Lacoste/GQ Super Bowl Party at The Elms Mansion in New Orleans, Louisiana on Feb. 2, 2013.

Hayden Panettiere arrives at the 70th annual Golden Globe Awards at the Beverly Hilton Hotel in Beverly Hills, Calif. on Jan. 13, 2013.

Hayden Panettiere attends the 46th annual CMA Awards at the Bridgestone Arena in Nashville, Tenn. on Nov. 1, 2012.

Connie Britton, Hayden Panettiere, center, and Kimberly Williams-Paisley present awards during the 46th annual CMA Awards at the Bridgestone Arena in Nashville, Tenn. on Nov. 1, 2012.

Hayden Panettiere arrives at the 64th Primetime Emmy Awards at the Nokia Theatre in Los Angeles on Sept. 23, 2012.

Actress Hayden Panettiere watches the New York Jets practice at NFL football training camp in Cortland, New York on July 29, 2012.

Olivia Munn, left, and Hayden Panettiere arrive at the 2012 ESPY Awards on July 11, 2012.

Hayden Panettiere and musician Seal attend the 19th Annual Elton John AIDS Foundation Academy Awards Viewing Party at the Pacific Design Center in West Hollywood on Feb. 27, 2011.

Hayden Panettiere attends the premiere of "Temple Grandin" at the Time Warner Screening Room in Manhattan on Jan. 26, 2010.

Hayden Panettiere arrives at the Teen Choice Awards on Sunday Aug. 9, 2009, in Universal City, Calif.

Hayden Panettiere arrives at the after-party for the Ford Flex Rally on Saturday, June 21, 2008, in Los Angeles.

Hayden Panettiere attends the launch of a national ad campaign for Candie's featuring Panettiere in Los Angeles on Thursday, Feb. 21, 2008.

Hayden Panettiere appears on stage during MTV's "TRL" show at the MTV Times Square Studios, Monday, Feb. 12, 2007, in New York.

Hayden Panettiere, right, and Ali Larter pose backstage at the 64th Annual Golden Globe Awards on Monday, Jan. 15, 2007, in Beverly Hills.

Hayden Panettiere arrives at the 33rd Annual People's Choice Awards on Tuesday, Jan. 9, 2007, in Los Angeles.

Hayden Panettiere arrives at SPIKE TV's 2006 Video Game Awards in Los Angeles on Friday, Dec. 8, 2006.

Hayden Panettiere poses on the red carpet during the William Rast Fashion Show at the Social Hollywood nightclub in Los Angeles on Tuesday, Oct. 17, 2006.

Adrian Pasdar and Hayden Panettiere pose during red carpet arrivals for NBC's introduction of its new season line-up in New York, Monday, May 15, 2006.

Julie Bowen, left, Hayden Panettiere, center, and Tim Allen pose as they arrive to the premiere of "Joe Somebody" on Wednesday, Dec. 19, 2001, in the Westwood Village of Los Angeles.