Joe Jackson to Branca: 'Mr. Who?'

10/2/2009 2:38 PM PDT

Joe Jackson to Branca: 'Mr. Who?'

Joe Jackson just arrived at the L.A. County Courthouse in the Michael Jackson probate case.

As we first reported, we expect some family members along with attorney Brian Oxman and possibly Katherine Jackson's lawyers, to challenge John Branca as the named co-executor in Jackson's will. We're told they have a document showing Jackson fired Branca. It's true, Jackson fired the lawyer several times over 29 years, but Jackson rehired Branca a week before his death.

The judge will be all ears at 1:30 PM PT when the parties discuss how well Jackson's 3 kids are doing with the guardianship.

By the way, when asked about Branca, Joe said, "Mr. Who?"