Halo-setting engagement rings are very popular among celebrities. Stranger Things star Millie Bobby Brown's engagement ring features a 4 carat round cut diamond in a halo setting for the ultimate sparkle. Eva Longoria opted for a ruby as the centre stone in her engagement ring, surrounded by an oversized halo of diamonds. And Cardi B went the extra mile with her double halo-setting engagement ring featuring 2 carats worth of pink and white diamonds surrounding an 8 carat pear-shaped centre diamond.