Murray's stance is fitting for a man who bought a Ferrari in 2009, a year after his first million-dollar year on the tour, but sold it almost immediately after discovering that "when I got out of it, I felt like an idiot".
He is not known for playing on his fame, preferring a quiet life in Oxshott, a well-heeled village in the Surrey footballer belt, plus the occasional training break at his second home in Miami. Asked whether he was planning to sell photographs of the ceremony to Hello! magazine, as Djokovic did last year, he smiled and answered firmly in the negative.
So who are the chosen few who have made the cut? The best-known is probably Tim Henman, who befriended Murray as soon as he joined the British Davis Cup team as a teenager. Until Henman's retirement in 2007, the two men spent many long hours in the locker room playing daft games like Top Trumps or throwing screwed-up pieces of paper into a wastepaper bin.
"Tim will be there," Murray said. "And Jules Rojer; he lives in Miami so I spend quite a lot of time with him." Rojer, for non-tennis obsessives, is a Dutchman ranked No?11 in the world in doubles, who can often be found attending Miami Heat basketball matches with Murray.
Some of Murray's Davis Cup team?mates, who will be playing alongside him in a quarter-final against France in July, have been asked along. "James Ward is coming, and we invited Kyle Edmund but he can't make it because he's playing. Jamie Delgado [who set a new Wimbledon record last summer by appearing for the 23rd consecutive year] will be there."
It is also understood that Dani Vallverdu, who is not just Murray's former assistant coach but one of his oldest friends, has won an invitation. These two have resolved most of the tension that surrounded Vallverdu's recent move to the camp of world No?8 Tomas Berdych, and which boiled over in the dramatic Melbourne semi-final during which Sears was seen on camera mouthing some choice words.
Murray and Sears flew back on Monday from Miami, where he lost against Djokovic in the final on Sunday, to begin preparations. He will be hosting his close family members at the Cromlix Hotel, which staged the wedding of his brother Jamie, and which he bought and upgraded in 2013.
"Kim's been pretty much doing it," he said. "I've tried to help out when she has asked, but I haven't been over-involved. I did all the food and cake tasting which I really enjoyed, although I didn't think I was going to. It's a big day for Kim. Pretty much everything is taken care of now. She seems fairly relaxed but as we get closer that might change."
As for Murray's mother Judy, he said: "She hasn't had loads of involvement. I haven't really spoken to her much at all. Although maybe her and Kim's mum have been chatting more than I'm aware of."
Murray and Sears plan to take their honeymoon at the end of the tennis season. At one point, he was considering heading straight out to Monte Carlo after the weekend's celebrations, but his strong performances in the past two tournaments in Miami and Indian Wells - which have carried him up one place to No?3 in the world - have convinced him that he can afford to take a small break next week.
"I'm going to go up to Scotland early and spend time with my family for a couple of days," he said. "I'm not going to hit any balls this week. Then on Wednesday or Thursday [after the wedding] I'm going to Barcelona for a small training block."
A total of around nine days away from the tennis court might not seem much. Yet for Murray - who spends around 40 weeks of the year on tour, and usually trains on Christmas Day - this will be new territory. As, indeed, will be his married life.
