Carson did the honors to speak at the wedding.  He was the groom's best man.
I was so nervous doing the best man's speech at the wedding today. I thought you did a great job. Thank you. But I could have sworn I was shaking so much, that I thought the mic would fall out of my hand. I don't think anybody at the event has noticed it. Being the best man at a wedding kind of made me want to get married too. Just don't make me the best man. I'm really horrible at giving speeches.