Mark Wahlberg, Martha Stewart and others mark 25 years since 9/11 with emotional tributes

Hollywood is pausing to remember.

As America marks the 25th anniversary of the Sept. 11, 2001, terrorist attacks, the nation is coming together for ceremonies and moments of silence honoring the 2,977 people killed.

Across Hollywood, celebrities are sharing personal reflections, tributes and messages of remembrance on the anniversary of the day that forever changed America.

PETE DAVIDSON SAYS BECOMING A DAD CHANGED HOW HE VIEWS FATHER'S DEATH ON 9/11

Mark Wahlberg shared...