JODIE FOSTER was so delighted with her firstborn baby Charlie that she went back to the same sperm bank for her second baby, friends say — and requested sperm from the same anonymous donor.

That means both of the actress’ sons — 3-year-old Charles and little Kit, born on September 29 — are the offspring of one super-handsome donor with an I.Q. of 160, according to the “Silence of the Lambs” star’s pals.

“Charles is a beautiful, smart, loving boy — and Jodie is absolutely blown away by him and the experience of being a mother,” a source close to the actress told The ENQUIRER. “There was no question that she wanted the same anonymous donor to provide sperm when she was ready to get pregnant again.

“This donor is a scientist with a Ph.D., tall and handsome, and has an I.Q. of 160 — genius level.

“Jodie picked him as the father of her first boy after researching the qualifications of other donors at a Los Angeles-area clinic.

“She feels that even though her kids may never know who their dad is, they’ll know they each have the same parents.”

The actress has been in a serious relationship with Cydney Bernard since she met her on the set of “Sommersby” in 1993. Cydney’s been sharing the joys of parenthood with Jodie since Charlie was born in 1998 — and they both have been looking forward to another addition to their “family.”

“In fact, Jodie’s already talking about having one more child,” said another insider. “She and Cydney want to have babies while they’re still young enough to chase them around the yard.

“As Jodie always says, ‘We aren’t exactly Ozzie and Harriet — but who is? A family is people who love each other.”