The WSL champions Liverpool have completed the signing of the 20-year-old Nigerian forward this morning.
Oshoala who won both the Golden Boot and Golden Ball - as Player of the Tournament - at last year's Under-20 World Cup Finals, and becomes the first player from Africa to compete in the Women's Super League.
"We beat a number of top American and European clubs to Asisat's signature," said Beard as he welcomed the 20-year-old striker. "Asisat is one of the best young players in the world."
In addition to her star performances in the U20 World Cup, Oshoala also collected the Golden Ball award as the senior Nigeria team qualified for the 2015 World Cup by winning the African Women's Championship.
Oshoala joins from Nigerian Women's Championship title winners, Rivers Angels and she will be wearing jersey no 14.
And she said: "Since I began my football career I have always dreamt of being a professional footballer, so to be able to join the reigning Women's Super League champions is absolutely fantastic.
"Liverpool Ladies are a massive club, who have some fantastic players who I believe can help to develop my game to the next level. It was also a big incentive to be able to play in the UEFA Women's Champions League, which is a huge competition and one I'm confident we can do well in."