Stars step out for the 2018 Toronto Film Festival - From Quincy Jones to Lady Gaga

The 2018 Toronto Film Festival brought out all of Hollywood's favorites over the weekend.

Julia Roberts joined the likes of Jonah Hill, Olivia Wilde, Jake Gyllenhaal and more where stars walked the red carpet to promote their upcoming films.

Rashida Jones and Quincy Jones shared a sweet father-daughter moment during the premier "Quincy," while Matthew McConaughey and Camila Alves cozied up at the InStyle party held at the Toronto Four Seasons Hotel.

Lady Gaga and Bradley Cooper continued their worldwide promo tour for "A Star is Born" where Gaga sported four very different dresses in one day for each of her appearances. Transitioning from a one-shoulder wine-hued velvet dress by Ralph & Russo to a Georgio Armani beaded silver slip dress, Gaga's outfit seemed a bit tamed until she hit the red carpet for premiere night.

The superstar stepped it up in a black Armani Privé FW'18 couture gown marrying the perfection of drama and elegance. Her removable black veil was the Gaga moment we all needed.

Perhaps the best dressed of the nights were Olivia Wilde in a black plunging gown by Alexandre Vauthier couture cinched with a gold belt paired with earrings by Fernando Jorge. Model Cara Delevingne turned heads in an of-the-moment mini dress from Balmain's Fall 2018 RTW collection.

For Melissa McCarthy, Collin Farrel, Viola Davis and more of your favorite stars, scroll through the gallery above for all of the best moments.