Kate Moss and Pete Doherty are planning to marry this weekend.The couple - who recently exchanged special rings during a Buddhist blessing ceremony in Thailand - are planning to tie the knot for real in the Cotswolds on Saturday (13.01.07), according to Britain's Grazia magazine.A friend of Pete's said: "Pete told me they were looking at this Saturday, January 13. At the moment it's happening at Kate's place in the Cotswolds. They're talking about having a registry office or a church ceremony on that day."However, the wedding arrangements are not going smoothly because the couple are reported to be arguing over Pete's choice of best man.Pete wanted to ask Babyshambles guitarist Mick Whitnall, but Kate thinks he is a bad influence.The source added: "Pete got really upset - it's his wedding too and he wants his mates there. As a compromise they have decided on Pete's ex-Libertines bandmate Carl Barat."