Credit: Jason Merritt/Getty Images

Sandra Bullock is putting her money where her mouth is.

The Oscar-winning actress and single mom, 46, donated $1 million to the American Red Cross toward earthquake and tsunami relief efforts in Japan, the charity told CNN on Thursday.

It's the largest donation made by a celebrity yet in the wake of the 9.0 magnitude earthquake that hit the island nation last Friday -- triggering devastating tsunamis, leaving thousands dead, untold devastation and a weakened nuclear power plant.

(The Red Cross points out that some celebs may have made anonymous donations.)

If you'd like to aid in disaster relief, text REDCROSS to 90999 to make a $10 donation.