Jeez, the love here is overwhelming.
From what I've seen and read, Morrissey is not only fond of Russell, he appears to enjoy his company as well. They seem to be, well, friends.
Sure, it's a bit one-sided: Russell is clearly an obsessive of the first order, but it looks like he's acheived what so few others have been able to - a genuine intimacy (or at least what passes for intimacy) with Morrissey.
If Morrissey attends, he'd make a great best man; he would do wonders with the wedding toast.
Brand certainly appears to be an unlikely candidate for successful husbandhood, it's true, but good luck for all that.