Jessica Alba is in mourning following the death of her 15-year-old pug Sid.

The actress, who is expecting her third child, took to Instagram on Thursday (27Jul17) to pay tribute to her beloved pooch, who featured in her 2003 dance film Honey.

"Our sweet Sid passed this morning," Jessica wrote alongside a slideshow of photos featuring Sid and her family. "She lived a long life, eating everything she could sniff out, she was my OG (original gangster) Rolldog, made her feature film debut in Honey.

"She was the best friend a girl could ask for. We went through so much together my Sid. RIP."