Drive actress Carey and musican Marcus tied the know in April 2012, according to reports.
US Weekly reported that stars such as Sienna Miller, Colin Firth and Jake Gyllenhaal were in attendance, with superstar Adele performing for the couple.
The ceremony apparently took place on a farm in Somerset, with 29-year-old Carey rumoured to have worn a backless ivory dress by Versace.
She reportedly had eight bridesmaids who were all dressed in turquoise gowns.
The pair announced their engagement in August of 2011, after just five months of dating.
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