The 34-year-old actress, who recently made her "Dancing With the Stars" debut, said the two make adorable couple, reported ET online.
"I actually met her a couple days ago. She is delightful. She's really sweet and we are welcoming her into the family. They're adorable, and we really like her," Sweetin said.
The actress plays Stephanie Tanner on "Fuller House," the spin-off of long-running television sitcom "Full House".