Question: What actress starred in Gravity and is also a philanthropist?
Context: Liesel Pritzker Simmons (born Liesel Anne Pritzker), stage name Liesel Matthews, is an American former child actress, heiress to the Hyatt Hotels fortune, and philanthropist.  She starred as Sara Crewe in "A Little Princess", a 1995 film adaptation of the Frances Hodgson Burnett classic, and as Alice Marshall in "Air Force One".  She is a member of the wealthy Pritzker family.  She is now known as a leader in the impact investing space and founded the Blue Haven Initiative in 2012 to that end. Lee Ya-Ching or Li Xiaqing (1912–1998), also known by her stage name Li Dandan (李旦旦 ), was a Chinese film actress and a pioneering aviator, as well as a philanthropist.  She was the first Chinese woman to be granted a civil aviation license in China, in 1936, and also co-founded its first civilian flying school.  As an actress, she starred in "Romance of the Western Chamber", and played the lead in an early adaptation of Mulan for the screen. Mary Fahl (born Mary Faldermeyer, July 1, 1958) is an American singer, songwriter and actress known for her work with October Project in the mid-1990s.  More recently she is known for her solo singing and acting career.  She released an EP "Lenses of Contact" in 2001, and a full album "The Other Side of Time" in 2003 on Sony Classical. " From the Dark Side of the Moon", was released on May 10, 2011.  She teamed up with producer John Lissauer, who also produced Leonard Cohen's "Hallelujah," for her fifth full-length album, "Love & Gravity", released in 2014.  Her music has been featured in the film "Gods and Generals", as well as the film version of the play "The Guys".  She also wrote the theme song, "Exiles: The Wolves of Midwinter," for the audiobook version of Anne Rice's novel "The Wolves of Midwinter", which was released on Oct. 15.  2013. Gravity is a 2013 science fiction thriller film directed, co-written, co-edited and co-produced by Alfonso Cuarón.  It stars Sandra Bullock and George Clooney as astronauts who are stranded in space after the mid-orbit destruction of their space shuttle, and their subsequent attempt to return to Earth. Krysten Alyce Ritter (born December 16, 1981) is an American actress and former model.  Ritter is known for her roles as lead superheroine Jessica Jones on the Marvel Cinematic Universe series "Jessica Jones" and "The Defenders", Jane Margolis on the AMC drama series "Breaking Bad", and Chloe on the ABC comedy series "Don't Trust the B---- in Apartment 23".  She has appeared in films such as "What Happens in Vegas" (2008), "27 Dresses" (2008), "Confessions of a Shopaholic" (2009), "She's Out of My League" (2010), "Veronica Mars" (2014), and "Big Eyes" (2014).  She has also appeared in roles "Gravity", "'Til Death", "Veronica Mars", and "The Blacklist". Laura Marie Marano (born November 29, 1995) is an American actress and singer.  She starred in the Disney Channel series "Austin & Ally" as Ally Dawson.  Marano was one of the five original classmates in "Are You Smarter than a 5th Grader? ".  She starred in "Without a Trace" for three seasons and also "Back to You", in both instances playing the daughter of the main characters.  Marano starred in the indie film "A Sort of Homecoming".  Marano also starred in the 2015 Disney Channel Original Movie "Bad Hair Day" along with "Good Luck Charlie" actress Leigh-Allyn Baker.  In 2015, she signed with Big Machine Records and released her debut single "Boombox" on March 11, 2016.  At the end of 2016, Big Machine Records made the decision to drop all of their pop artists.  Marano then signed to Warner Bros.  Records in 2017 and plans to release her debut album with the label.  She is also the younger sister of actress Vanessa Marano who starred in Freeform's "Switched at Birth". Linda Edna Cardellini (born June 25, 1975) is an American actress.  She is known for her roles as Lindsay Weir on "Freaks and Geeks", Samantha Taggart on "ER", Velma Dinkley in the live-action "Scooby-Doo" feature films, Sylvia Rosen, a neighbor of Don Draper's on the AMC drama series "Mad Men", Meg Rayburn on the Netflix original series "Bloodline", Cassie in "Brokeback Mountain", and Laura Barton in "".  She is also known for voicing roles in animated projects such as CJ in "Regular Show", Wendy Corduroy in "Gravity Falls", and Megan in "Sanjay and Craig". Lisa Rani Ray (born April 4, 1972) is a Canadian actress, model, television host, philanthropist and social activist.  In 2005 she appeared in the Canadian film "Water", which premièred at the Toronto International Film Festival.  In 2008 she starred alongside Sheetal Sheth in the romance films "I Can't Think Straight" and "The World Unseen". Sandra Annette Bullock ( ; born July 26, 1964) is an American actress, producer, and philanthropist.  She made her acting debut with a minor role in the 1987 thriller "Hangmen", and made her television debut in the film "Bionic Showdown: The Six Million Dollar Man and the Bionic Woman" (1989), and played the lead role in the short-lived NBC sitcom "Working Girl."  Her breakthrough role was in the film "Demolition Man" (1993).  She subsequently starred in several successful films including "Speed" (1994), "While You Were Sleeping" (1995), "The Net" (1995), "A Time to Kill" (1996), "Hope Floats" (1998), and "Practical Magic" (1998). Jason Morgan Ritter (born February 17, 1980) is an American actor, and the son of actress Nancy Morgan and actor John Ritter, known for his roles as Kevin Girardi in the television series "Joan of Arcadia", Ethan Haas in "The Class", as Sean Walker in the NBC series "The Event", and as the voice of Dipper Pines in "Gravity Falls".  He also played the recurring role of Mark Cyr in the NBC television series "Parenthood", for which he received an Emmy Award nomination.
Answer: Sandra Bullock