A Californian sperm bank is offering a celebrity look-a-like service to women allowing them to choose a donor based on their resemblance to a Hollywood star.

California Cyrobank Donor Look-a-likes in Los Angeles has around 500-600 anonymous donors who are each assigned two to three celebrities they bear a resemblance to, helping clients imagine what they look like.

The clinic is one of the largest providers of donated sperm in the world and one of few to offer the service.

Details about the donors still include height, eye and hair colour as well as the celebrity a donor resembles.

Staff at CBB judge the donors before matching them up with their A-list counterparts, which can vary between actors, musicians, athletes or "anyone else famous enough to be found on the web".

Last month company revealed Ben Affleck is a popular choice.

"It's really interesting what people are looking for and it's one of the reasons we have so many donors - because there's a wide range of preferences out there," Scott Brown, vice president of communications for California Cryobank told The Sun.

The website states "No celebrity is meant as an exact match for any donor, nor should you assume that your future children will look like any celebrity listed" but acts as a guide to give a better sense of the donor's appearance.

Newshub.