Two college freshman who applied to find roommates at Tulane University found that they were a lot alike.

They became fast friends on Facebook and joked to their friends that they were probably half-sisters, but they never thought it might be true — even knowing they both were conceived with the help of a sperm-donor.

"We had a lot in common," said one of the young women, Mikayla Stern-Ellis.

For instance, they both love acting.

Then, she and Emily Nappi discovered during winter break that they, indeed, are half-sisters because they share the same Colombian sperm donor.

(READ the story in the Tulane Hullabaloo)