Paul McCartney and Nancy Shevell got engaged in May and if erecting a tent at the former Beatles member's home is any indication, the couple might tie the knot on Sunday.
The pair announced in September that they planned to marry at the same venue where the 69-year-old singer wed his first wife, Linda, more than 40 years ago.
A local party planning company van was also spotted at the singer's home in London's St. John's Wood neighborhood, where the reception is expected to be held, according to the Associated Press.
McCartney's spokesman had no immediate comment on the report.
According to the British tabloid The Sun, Shevell will be wearing a wedding dress designed by her future daughter-in-law, Stella McCartney.
The couple is also planning a second ceremony in the Hamptons, where they fell in love four years ago, according to the tabloid.
The two recently gave notice of their intention to wed at the Westminster Register Office, also known as Old Marylebone Town Hall, UK news outlets reported. Shevell is set to become the singer's third bride.
The couple can wed at the venue, located near Baker's Street and Regent's Park in London, as early as 16 days after submitting the documents but must marry there within a year or they must post a fresh notice.
McCartney's wedding to first wife Linda Eastman took place at Old Marylebone Town Hall in 1969. She died at age 56 in 1998 after battling breast cancer. The couple had three children - fashion designer Stella McCartney, 40, Mary, 42, James, 34. Eastman also has a 48-year-old daughter, Heather, from a previous relationship.
"I'm delighted that Paul and Nancy have chosen Marylebone Town Hall for their special day," BBC News quoted Superintendent Registrar Alison Cathcart of the Westminster Register Office as saying. "I am honoured to be conducting the ceremony and will get to see the look of joy on both their faces when I declare them husband and wife."
Others who have wed at Old Marylebone Town Hall include former Oasis singer Liam Gallagher and actress Patsy Kensit, Hollywood power couple Melanie Griffith and Antonio Banderas and McCartney's daughter Mary. The venue was also the site of the 1981 wedding of former Beatles drummer Ringo Starr and Barbara Bach, a Bond Girl who starred in the 1977 film "The Spy Who Loved Me."
This will mark Shevell's second marriage. She was married for more than 20 years to lawyer Bruce Blakeman, who was a candidate in the 2010 U.S. Senate special election in New York.
The Daily Mail quoted Shevell as saying that her wedding to McCartney will be a "small family affair.".
McCartney's 2002 wedding to his second wife, Heather Mills, at Castle Leslie in Ireland cost about $2.3 million, the newspaper said. The two divorced in 2008. They have a 7-year-old daughter, Beatrice.