This Means War may refer to:

Laura Jeanne Reese Witherspoon (born March 22, 1976), better known as Reese Witherspoon, is an American actress and film producer. Witherspoon landed her first feature role as the female lead in the film The Man in the Moon in 1991; later that year she made her television acting debut, in the cable movie Wildflower. In 1996, Witherspoon appeared in Freeway and followed that appearance with roles in three major 1998 films: Overnight Delivery, Pleasantville and Twilight. The following year, Witherspoon appeared in the critically acclaimed Election, which earned her a Golden Globe nomination.

2001 marked her career's turning point with the breakout role as Elle Woods in the box office hit Legally Blonde, and in 2002 she starred in Sweet Home Alabama, which became her biggest commercial film success to date. 2003 saw her return as lead actress and executive producer of Legally Blonde 2: Red, White & Blonde. In 2005, Witherspoon received worldwide attention and praise for her portrayal of June Carter Cash in Walk the Line, which earned her an Academy Award, Golden Globe, BAFTA and Screen Actors Guild Award for Best Actress in a Leading Role.

Christopher Whitelaw "Chris" Pine (born August 26, 1980) is an American actor. Best known for his role as James T. Kirk in the 2009 film Star Trek, he has also appeared in films such as The Princess Diaries 2: Royal Engagement (2004), Just My Luck (2006), Smokin' Aces (2007), Unstoppable (2010), and This Means War (2012).

Pine was born in Los Angeles, California. His father, Robert Pine, is an actor who appeared in CHiPs as Sergeant Joseph Getraer, and his mother, Gwynne Gilford, is a former actress who is now a practicing psychotherapist. He has an older sister, Katie. His maternal grandmother, Anne Gwynne (née Marguerite Gwynne Trice), was a Hollywood actress, and his maternal grandfather, Max M. Gilford (born Max Goldfarb), was an attorney who was elected president of the Hollywood Bar Association. Pine's ancestry includes Jewish (from his maternal grandfather), Welsh, and English. He has stated, "I definitely have a spiritual outlook... I am not a religious guy, I am probably agnostic".

Edward Thomas "Tom" Hardy (born 15 September 1977) is a British actor and screenwriter. He is known for his roles in Star Trek: Nemesis, RocknRolla, Bronson, Inception, Warrior, Tinker Tailor Soldier Spy, This Means War, and the television movie Stuart: A Life Backwards, for which he received a nomination for the BAFTA Best Actor. He also played Freddie Jackson in Martina Cole's The Take, a television movie based on her novel of the same name. He will portray the primary villain Bane in the upcoming Batman film, The Dark Knight Rises.

Hardy, an only child, was born in Hammersmith, and brought up in East Sheen, London. His mother, Anne (née Barrett), is an artist and painter whose family was Irish Catholic. His father, Edward "Chips" Hardy, is an advertisement, comedy and novel writer. Hardy studied at two private schools, Reed's School and Tower House School, then at Richmond Drama School, and subsequently at the Drama Centre London. He began his debut in war dramas, winning the part of United States Army Private John Janovec in the award-winning HBO and BBC miniseries Band of Brothers. He made his feature film debut in Ridley Scott's 2001 war thriller Black Hawk Down.