Alexandra Burke is engaged to marry footballer Darren Randolph after three years of dating. The 36-year-old pop star revealed the happy news in a post on Instagram which showed the goal keeper down on one knee asking for her hand in marriage. In the post shared on Instagram, admitted she’s looking forward to getting hitched. She wrote: “Here’s to us forever! I can’t believe I get to marry my best friend. Bring on the Burke-Randolph wedding. I can’t wait to call you my husband.” The pair have been dating since April 2021 and are parents to two children together. A source told The Sun newspaper …