Actress Miranda Cosgrove is leading a new TV campaign to raise awareness about bullying in the digital age.

The iCarly star has joined forces with executives at children's TV network Nickelodeon and a host of its young actors to stamp out the hurtful behavior among youths and advise kids on what to do if they are targeted by bullies online.

In one advertisement featuring True Jackson VP actress Ashley Argota, she says, "Sign off the computer; don't reply to a hostile messenger; block bullies from access; make a copy of the message to show to an adult you trust."

Nickelodeon's campaign has been launched across the U.S. in connection with officials at advocacy group Common Sense Media.

The TV stars aren't the only ones speaking out against bullying - celebrities including Justin Bieber, Christina Aguilera and Cher have all issued public service announcements in recent months following a spate of school suicides in America linked to bullying last year.

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