Stars remember on 9/11 anniversary

Alec Baldwin arrives at the premiere of "Rise of the Guardians" during the 2012 AFI Fest on Nov. 4, 2012 in Hollywood.
Alberto E. Rodriguez/Getty Images For AFI

On the 12th anniversary of the 9/11 terrorist attacks, celebrities have taken to social media sites to send their prayers to families who lost loved ones that day.

Miley Cyrus has urged her Twitter followers to do a good deed, while Alec Baldwin wondered, "How do we recover from the lingering fear and anxiety of 9/11?"

See how other celebrities are paying tribute below: