'The Vampire Diaries' stars Kat Graham and Ian Somerhalder hated each other at first

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'The Vampire Diaries' stars Kat Graham and Ian Somerhalder hated each other at first
SAN DIEGO, CA - JULY 26: Actors Kat Graham (L) and Ian Somerhalder attend CW's 'The Vampire Diaries' panel during Comic-Con International 2014 at the San Diego Convention Center on July 26, 2014 in San Diego, California. (Photo by Ethan Miller/Getty Images)
Kat Graham, left, and Ian Somerhalder attend the "Vampire Diaries" panel on day 3 of Comic-Con International on Saturday, July 26, 2014, in San Diego. (Photo by Tonya Wise/Invision/AP)
Kat Graham arrives at the Critics' Choice Television Awards at the Beverly Hilton Hotel on Thursday, June 19, 2014, in Beverly Hills, Calif. (Photo by Richard Shotwell/Invision/AP)
Kat Graham arrives at Entertainment Weekly's Annual Comic-Con Closing Night Celebration at the Hard Rock Hotel on Saturday, July 26, 2014, in San Diego. (Photo by John Shearer/Invision for Entertainment Weekly/AP Images)
Actress Kat Graham attends the 5th Annual ELLE Women in Music Celebration at theAvalon on April 22, 2014 in Hollywood, California. (Photo by Paul A. Hebert/Invision/AP)
Kat Graham arrives at the 39th Annual Gracie Awards on Tuesday, May 20, 2014, in Beverly Hills, Calif. (Photo by Richard Shotwell/Invision/AP)
Kat Graham arrives at the 25th Annual GLAAD Media Awards on Saturday, April 12, 2014 Richard Shotwell/Invision/AP)
Kat Graham attends a Vampire Academy special event featuring a performance by Iggy Azalea hosted by The Weinstein Company and Universal Music Enterprises, on Monday, Feb. 3, 2014, in Los Angeles. (Photo by Jordan Strauss/Invision for The Weinstein Company/AP Images)
Kat Graham arrives at the 11th Annual John Varvatos Stuart House Benefit on Sunday, April 13, 2014, in West Hollywood, Calif. (Photo by Richard Shotwell/Invision/AP)
Kat Graham wearing Mathieu Mirano attends the Heart Truth Red Dress Collection fashion show on Thursday, Feb. 6, 2014 in New York. (Photo by Charles Sykes/Invision/AP)
Actress Kat Graham attends the Vanity Fair and L'Oreal Paris D.J. Night at Sadie Kitchen and Lounge on Friday, Feb. 28, 2014 in Los Angeles. (Photo by Dan Steinberg/Invision/AP)
Kat Graham arrives at TrevorLIVE Los Angeles Benefit at the Hollywood Palladium, on Sunday, December, 8, 2013 in Los Angeles, Calif. (Photo by Richard Shotwell/Invision/AP)
Kat Graham attends the DETAILS Hollywood Mavericks Party hosted by Dan Peres at Soho House on Thursday, Dec. 5, 2013, in West Hollywood, Calif. (Photo by John Shearer/Invision for DETAILS Magazine/AP Images)
Kat Graham arrives at the ELLE 20th annual "Women in Hollywood" event at the Four Seasons Hotel on Monday, Oct. 21, 2013 in Los Angeles. (Photo by Jordan Strauss/Invision/AP)
Actress Kat Graham arrives at the EW party on Day 4 of the 2013 Comic-Con International Convention on Saturday, July 20, 2013 in San Diego. (Photo by Paul A. Hebert/Invision/AP)
Kat Graham attends the 16th Annual Friends 'N' Family Pre-Grammy Party, on Friday, February, 8, 2013 in Los Angeles(Photo by Todd Williamson/Invision for Billboard Magazine/AP Images)
Actress and pop-music singer Kat Graham visits radio station Q102 iHeartradio Performance Theater on Tuesday, Feb. 5, 2013, in Philadelphia. (Photo by Owen Sweeney/Invision/AP)
SAN DIEGO, CA - JULY 26: Actors Kat Graham (L) and Ian Somerhalder attend CW's 'The Vampire Diaries' panel during Comic-Con International 2014 at the San Diego Convention Center on July 26, 2014 in San Diego, California. (Photo by Ethan Miller/Getty Images)
UNSPECIFIED, JAMAICA - JULY 03: (EXCLUSIVE COVERAGE) Cottrell Guidry and Kat Graham are seen vacationing at Sandals Whitehouse European Village & Spa on July 3, 2014 in an unspecified location in Jamaica. (Photo by Alexander Tamargo/Getty Images for Sandals Whitehouse European Village & Spa)
HOLLYWOOD, CA - FEBRUARY 15: Kat Graham arrives at The Annual Make-Up Artists and Hair Stylists Guild Awards held at Paramount Theater on the Paramount Studios lot on February 15, 2014 in Hollywood, California. (Photo by Michael Tran/FilmMagic)
ATLANTA, GA - FEBRUARY 08: Writer/producer Julie Plec, director of photogrpahy Darren Ganet, actors Kat Graham, Zach Roerig, Michael Trevino, and Michael Malarkey speak on the panel at the Prime-time Series Screening: The CW Presents 'The Vampire Diaries' at SCADshow Main Stage on February 8, 2014 in Atlanta, Georgia. (Photo by Rick Diamond/Getty Images for SCAD)
SAN DIEGO, CA - JULY 26: Actresses Kat Graham (L) and Nina Dobrev attend Entertainment Weekly's annual Comic-Con celebration at Float at Hard Rock Hotel San Diego on July 26, 2014 in San Diego, California. (Photo by Ethan Miller/Getty Images)
UNIVERSAL CITY, CA - JULY 22: Paul Wesley, Nina Dobrev, Ian Somerhalder and Kat Graham pose in the press room at the 2012 Teen Choice Awards at Gibson Amphitheatre on July 22, 2012 in Universal City, California. (Photo by Jeffrey Mayer/WireImage)
ATLANTA, GA - NOVEMBER 09: Actors Nina Dobrev and Kat Graham attend The Vampire Diaries 100th Episode Celebration on November 9, 2013 in Atlanta, Georgia. (Photo by Rick Diamond/Getty Images for Warner Bros)
BURBANK, CA - SEPTEMBER 29: Actors Ian Somerhalder and Kat Graham arrive at the 2012 Environmental Media Awards at Warner Bros. Studios on September 29, 2012 in Burbank, California. (Photo by Gregg DeGuire/WireImage)
BEVERLY HILLS, CA - MARCH 10: (L-R) Executive producer Julie Plec, actor Matt Davis, actress Nina Dobrev, actor Paul Wesley, actress Candice Accola, actor Ian Somerhalder and actress Kat Graham attend The Paley Center For Media's PaleyFest 2012 Honoring 'The Vampire Diaries' at the Saban Theatre on March 10, 2012 in Beverly Hills, California. (Photo by Frederick M. Brown/Getty Images)
ATLANTA, GA - NOVEMBER 09: Actors Nina Dobrev and Kat Graham attend The Vampire Diaries 100th Episode Celebration on November 9, 2013 in Atlanta, Georgia. (Photo by Rick Diamond/Getty Images for Warner Bros)
ATLANTA, GA - NOVEMBER 09: Actress Kat Graham attends The Vampire Diaries 100th Episode Celebration on November 9, 2013 in Atlanta, Georgia. (Photo by Chris McKay/Getty Images for Warner Bros)
IMAGE DISTRIBUTED FOR FOSTER GRANT - The Vampire Diaries actress and musician Kat Graham celebrates Foster Grant's 85th Anniversary, Thursday, July 17, 2014, at Gansevoort Park Avenue in New York. Graham is the latest star to be featured in the brand’s historic “Who’s that behind those Foster Grants?” ad campaign. Foster Grant is credited with the birth of sunglasses in the United States, selling the first pair on the Atlantic City boardwalk for 10 cents in 1929. (Photo by Diane Bondareff/Invision for Foster Grant/AP Images)
ATLANTA, GA - SEPTEMBER 25: Kat Graham attends the Montblanc celebration for the grand re-opening of the Atlanta Boutique with Kat Graham, Dave Annable and Kristen Ledlow on September 25, 2014 in Atlanta, Georgia. (Photo by Craig Bromley/Getty Images for Montblanc)
ATLANTA, GA - SEPTEMBER 25: Kat Graham attends the Montblanc celebration for the grand re-opening of the Atlanta Boutique with Kat Graham, Dave Annable and Kristen Ledlow on September 25, 2014 in Atlanta, Georgia. (Photo by Craig Bromley/Getty Images for Montblanc)
NEW YORK, NY - SEPTEMBER 09: Kat Graham is seen during Mercedes-Benz Fashion Week Spring 2015 at Lincoln Center for the Performing Arts on September 9, 2014 in New York City. (Photo by John Parra/WireImage)
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By CHELSEA HUANG

"The Vampire Diaries" is more about sucking blood, but according to star Kat Graham, during the first series of the hit CW show, there was actually some bad blood between her and another star.

"Ian and I used to not like each other at all. We hated each other first season," Graham shared in an exclusive interview with AOL. "Now he's my best friend in the cast. He's the person I can say in 30 years will be one of my closest friends."

As for the reason behind the personality clash, Graham explained it was all about maturity.

"We wanted to kill each other, but I was a kid and we were both very strong people. I was still finding myself, and throughout the years, he's helped me find myself and is now one of my greatest inspirations."

Perhaps her friendship with Somerhalder, who is currently dating actress Nikki Reed, has grown purely because they get more screen time together -- and the writing has in some cases hindered other relationships.

"One person I've actually known for 10 years is Michael Trevino, and he's someone I wish after six seasons I had more time with. But it's also how they're writing. If I'm doing more scenes with one person, I might be closer with them."

Graham's character Bonnie has certainly been a hot commodity this season, but that doesn't mean she's not reserving time for her other hobbies. Graham recently surprised visitors in small-town Bland, MO with Pizza Hut to support their new "Flavor of Now" initiative to bring healthy, affordable -- and pretty much endless -- pizza combinations to local communities.

The talented 25-year-old also has a successful music career underway, with a new single to be dropped this February. Despite all the hustle and bustle, there's one thread that ties it all together, and makes it all worth it.

"I'm learning about the balance, and I'm learning about the kind of person I want to be," Graham shared. "As long as I'm connecting with people with 'Vampire Diaries' or music -- that is the balance. Connecting to people is what creates that balance. "

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