Carey Mulligan and Marcus Mumford are reportedly set to tie the knot this weekend.

The 26-year-old Drive actress and the Mumford and Sons singer - who got engaged last August after just five months of dating - are apparently planning to exchange vows in the English countryside within the next few days.

"Carey and Marcus are counting down the days till they tie the knot! She is absolutely walking on air and can hardly contain her excitement. It's going to be an amazing weekend as they will be surrounded by their closest family and friends. It's a dream come true for Carey," a source told RadarOnline.com.

The pair first hooked up when Marcus performed in Nashville, Tennessee, just a few months after Carey split from ex-boyfriend Shia LaBeouf. "Marcus invited Carey to watch him play a secret show in the basement of his friend Mike Harris's home in Nashville. She sat in the front row and while he was singing Marcus looked down at Carey and she blushed. It was clear they had chemistry. Afterwards they went to the City House restaurant and dined with friends but they sat together and acted like a couple," an insider said.