04/27/2014 at 12:00 PM EDT
You've been warned, William Tell: There's yet another cutie sharing Lauren Conrad's
, 28, introduced fans to her latest furry addition on Saturday.
"Newest member of the Conrad clan stole me heart," Tell's fiancée wrote on Instagram
Her new pup will find good company at Conrad's home: She's already a dog mom to rescues Chloe and Fitz
, who are frequent muses on her Instagram.
And here's hoping this cutie will fit right in with Tell and her canine brood, whom she described as the lives of the party.
"[My dogs] get thrilled when I have people over because they get so much attention," she told PEOPLE last May
. "They're the belles of the ball."