Question: Who starred alongside Cameron Diaz in the 2008 comedy film What Happens in Vegas?
Context: The Green Hornet is a 2011 American superhero action comedy film based on the character of the same name by George W. Trendle and Fran Striker that had originated in a 1930s radio program and has appeared in movie serials, a television series, comic books, and other media.  Directed by Michel Gondry and written by Seth Rogen and Evan Goldberg, the film stars Rogen, Jay Chou, Christoph Waltz, Edward James Olmos, David Harbour, Tom Wilkinson and Cameron Diaz.  The film was released to theaters in North America on January 14, 2011 by Columbia Pictures, in versions including RealD Cinema and IMAX 3D.  The film earned $227.8 million on a $120 million budget.  "The Green Hornet" was released on DVD, Blu-ray, and Blu-ray 3D on May 3, 2011 by Sony Pictures Home Entertainment. Shrek the Third is a 2007 American computer-animated fantasy comedy film and the third installment in the "Shrek" franchise, produced by DreamWorks Animation.  It is the sequel to 2004's "Shrek 2", and is the first in the series to be distributed by Paramount Pictures , which acquired DreamWorks Pictures, the former parent of DreamWorks Animation, in 2006.  Chris Miller and Raman Hui directed and co-directed the film, respectively, with the former also co-writing the screenplay with Jeffrey Price, Peter S. Seaman, and Aron Warner.  In addition to Mike Myers, Eddie Murphy, Cameron Diaz, Antonio Banderas, Rupert Everett, Julie Andrews, and John Cleese, who reprise their roles from "Shrek 2", the film also features Justin Timberlake in the role of Arthur Pendragon and Eric Idle as Merlin.  Harry Gregson-Williams composed the original music for the film.  The story takes place eight months after the marriage of Shrek and Fiona in the first film.  Reluctantly reigning over the kingdom of Far, Far Away, Shrek sets out to find the next heir to the throne—Fiona's cousin Artie, while Prince Charming is plotting to overthrow Shrek and become king. The Last Supper is a 1996 black comedy film directed by Stacy Title.  It stars Cameron Diaz, Ron Eldard, Annabeth Gish, Jonathan Penner and Courtney B. Vance as five liberal graduate school students who invite a string of conservatives to dinner in order to murder them.  The film premiered at the 1996 Sundance Film Festival. Be Kind Rewind is a 2008 comedy film written and directed by Michel Gondry, and starring Jack Black, Mos Def, Melonie Diaz, Danny Glover, Mia Farrow and Sigourney Weaver.  The film first appeared on January 20, 2008 at the 2008 Sundance Film Festival.  It was later shown at the Berlin International Film Festival.  The film opened on February 22, 2008 in the United Kingdom and in North America. Knight and Day is a 2010 American action comedy film starring Tom Cruise and Cameron Diaz.  The film, directed by James Mangold, is Cruise and Diaz's second on-screen collaboration following the 2001 film "Vanilla Sky".  Diaz plays June Havens, a classic car restorer who unwittingly gets caught up with the eccentric secret agent Roy Miller, played by Cruise, who is on the run from the CIA. Son of the Mask is a 2005 American fantasy comedy film directed by Lawrence Guterman.  The film stars Jamie Kennedy as Tim Avery, an aspiring cartoonist from Fringe City who has just had his first child born with the powers of the Mask.  It is the stand-alone sequel to the successful 1994 film "The Mask", an adaptation of Dark Horse Comics which starred Jim Carrey and Cameron Diaz. Cameron Michelle Diaz-Madden (born August 30, 1972) is an American actress, comedian, producer, former fashion model and author.  She rose to stardom with roles in "The Mask" (1994), "My Best Friend's Wedding" (1997) and "There's Something About Mary" (1998), and is also known for voicing the character of Princess Fiona in the "Shrek" series (2001–2010).  Other high-profile films include "Charlie's Angels" (2000) and its sequel "" (2003), "The Sweetest Thing" (2002), "In Her Shoes" (2005), "The Holiday" (2006), "What Happens in Vegas" (2008), "My Sister's Keeper" (2009), "Knight and Day" (2010), "The Green Hornet" (2011), "Bad Teacher" (2011), "What to Expect When You're Expecting" (2012), "The Counselor" (2013), "The Other Woman", "Sex Tape", and " Annie" (all 2014). Bang Bang!  is a 2014 Indian action comedy film directed by Siddharth Anand and produced by Fox Star Studios.  The film is an official remake of the Hollywood film "Knight and Day" and features Hrithik Roshan and Katrina Kaif in the lead roles performed by Tom Cruise and Cameron Diaz respectively in the original.  The main antagonist of the film is Danny Denzongpa.  The film was distributed and marketed by Fox Star Studios in collaboration with Fox International Productions worldwide. What Happens in Vegas is a 2008 American comedy film directed by Tom Vaughan, written by Dana Fox and starring Cameron Diaz and Ashton Kutcher.  The title is based on the Las Vegas marketing catchphrase "What happens in Vegas, stays in Vegas." The Other Woman is a 2014 American comedy film, directed by Nick Cassavetes and written by Melissa Stack.  The film stars Cameron Diaz, Leslie Mann and Kate Upton, with Nikolaj Coster-Waldau, Nicki Minaj and Taylor Kinney in supporting roles.  The film follows three womenCarly (Diaz), Kate (Mann), and Amber (Upton)who are all romantically involved with the same man, Mark (Coster-Waldau).  After finding out about each other, the trio decide to take revenge on Mark.
Answer: Ashton Kutcher