Hailey Bieber wears Saint Laurent bridal look to renew wedding vows and announce pregnancy

Hailey and Justin Bieber took to social media last night to announce that they are expecting their first child, confirming the news with a high-fashion photo shoot that was taken while they were renewing their vows in Hawaii.

Naturally, Hailey wore a bridal-inspired look for the ceremony, in a white lace Saint Laurent gown and matching lace veil, which she wore like a headscarf, trailing down her shoulders.

The fitted, off-the-shoulder dress featured long sleeves and showed off her growing baby bump. She finished her look with a pair of black Saint Laurent sunglasses.

Justin was dressed more casually, in a black furry jacket, white t-shirt and baseball cap.

The couple's vow-renewal ceremony took place in Kilauea, Hawaii, and they were pictured in the middle of a grassy field. They celebrated with matching Tiffany & Co rings – two Forever bands in platinum with a full circle of diamonds.