It seems Angelina Jolie doesn't have the most perfect pout in Hollywood, at least according to the findings of a U.S. biometrics specialist.

"Lipologist" Dr Kendra Schmid developed The Baileys Lip Attractiveness Software, which uses a scientific formula to rate lips according to their proportion, size, fullness, texture, colour and shape.

Dr Schmid says, “This is a world first in biometrics; using formulas to objectively score lips according to the characteristics of size, shape, texture and colour."

Sultry Italian actress Monica Belluci - whose lips are apparently "full, smooth and ideally proportioned so that the height of her lips is two-thirds the width" - scored a perfect 10 on Schmid's 10-point attractiveness scale.

In second place was Scarlett Johannson who scored 9.66, Halle Berry came in third with 9.61, Beyonce Knowles was fourth with 8.65, and Angelina Jolie rounded off the top five with 7.89.

See the top 5 global lips list below