Mel B is replacing Sharon Osbourne on America's Got Talent.

The 37-year-old former Spice Girl - who previously worked on Australian X Factor - has reportedly signed a deal to join the judging panel for the NBC ahead of the start of its auditions in Los Angeles next month, after winning over the show's boss Simon Cowell.

"Simon loves trying people out on his shows, Mel's already been a judge on X Factor Australia and it's too far for her to keep taking the kids. She did want to do X Factor UK, but Simon really wanted her to do America's Got Talent. She's outspoken and never afraid to speak her mind, she makes for good TV. NBC execs will be watching through their eyes - let's hope they won't be using the delay button on live TV," a source said.

The mother-of-three is expected to join Howard Stern and Howie Mandel on the live TV show.