WATCH: Lady Gaga Shines w/ Bradley Cooper in “A Star is Born”

It's her leading role big screen debut...

Arguably the biggest premiere at the Toronto International Film Festival is, “A Star is Born.” The two leading stars of the movie are quite likely the most anticipated red carpet arrival in Bradley Cooper and Lady Gaga.

The movie marks Bradley Cooper’s directing debut and is the first time Lady Gaga has played a leading big screen role.

It’s a remake about a hard drinking country rocker who launches the career of a singer/songwriter.

Critics are predicting it to be nominated for all 5 major Oscar categories.