Sandra Bullock has made a huge donation to the Red Cross to help people in quake-hit Japan.
The Blind Side actress made the $1.4 million (US$1 million) donation to the American Red Cross on behalf of her family.
The organisation said: "The American Red Cross is extremely grateful for this generous support from Sandra Bullock and her family. This contribution is vitally important as the Red Cross works to provide critical assistance and essential relief items in this time of urgent need for so many people in Japan."
Though the donation from Bullock - who previously gave $1.4 million to Doctors Without Borders to assist with helping Haiti following an earthquake in 2010 - is the biggest celebrity contribution to be made public, other stars have been backing the cause.
Lady Gaga has raised about $350,000 by designing a wristband - which is read and white and reads "We pray for Japan" in both English and Japanese - which has been on sale for US $5.
She tweeted: "Monsters: in just 48hrs you've raised a quarter of a million dollars for Japan Relief. It's important we help. X (sic)"
Gaga has been among many stars to come forward on the social networking website to help raise donations.
Katy Perry tweeted: "Remember as you go about your day please prayforjapan & if you are able, text REDCROSS to 90999 to donate $10 to Japan's emergency relief. (sic)"
Teen heartthrob Justin Bieber also sent a message to fans, writing: "Japan is one of my favourite places on earth - it's an incredible culture with amazing people. My prayers go out to them. We all need to help."
