Who is Britney Spears’s new lawyer Mathew Rosengart?

A former federal prosecutor, his A-list clients include Steven Spielberg, actor Sean Penn and director Kenneth Lonergan.

Britney Spears’ newly appointed lawyer Mathew S Rosengart looks set to step up the singer’s attempts to end her conservatorship (AP Photo/Chris Pizzello)

In her attempts to force the termination of the strict legal arrangement controlling her life and career, Britney Spears has enlisted the help of a high-powered Hollywood lawyer.

Mathew S Rosengart was confirmed as the singer’s new representative on Wednesday, attending the latest hearing in Los Angeles.