11/06/2012 at 12:00 PM EST
knows how to go stealth.
The actress, 30, and her new husband Justin Timberlake
, 31, recently pulled off their top-secret nuptials
in Puglia, Italy, on Oct. 19. And the newlyweds employed the same hush-hush strategy for their honeymoon.
“None of us know where they went," says Biel's close friend and former 7th Heaven
costar Beverley Mitchell, who attended the wedding along with her husband Michael Cameron. "She keeps a really good secret!"
The pair have since surfaced in Africa, where they reportedly stayed at the Faru Faru resort in Tanzania.
Meanwhile, Mitchell recently trusted Biel with a closely guarded secret of her own: She's expecting her first child
"It was pretty exciting" sharing the news with 'Auntie Jess,' " says Mitchell, 31. "She was like, 'Oh my God!' "