House Minority Leader Nancy Pelosi (D-Calif.) has invited Maryland Gov. Martin O'Malley (D) and singer Tony Bennett to sit in her guests seats for Tuesday night's State of the Union Address.

(Jacquelyn Martin -- Associated Press) (Jacquelyn Martin -- Associated Press)

Pelosi's office previously announced that she has invited an unidentified mother and daughter from Newtown, Conn. to attend the speech. The young girl, who Pelosi's office said would not be identified for security reasons, recently wrote to the Democratic leader about her concerns with gun control. The girl has received threats for starting a Facebook group about gun-control concerns, she said in her letter to Pelosi.

O'Malley's appearance comes as he's widely considered a potential 2016 presidential candidate. He's also governor of the state where Pelosi was born and raised.

Bennett has joined in recent weeks with other celebrities to push Congress to consider gun-control legislation. He attended a Capitol Hill rally last week.