The couple are the proud parents of a Merle English Bulldog they have named Rolly, reported Us magazine.
Jenner, 18, already has three miniature Greyhounds named Norman, Bambi and Sophia.
Tyga, 25, excitedly shared a selfie of himself with the latest pup with the caption "Rolly" and several dollar signs. In the snap, the regal dog looks off into the distance with a concerned look on his face.
The 18-year-old reality star, meanwhile, posted several videos of the puppy getting used to new surroundings with a simple caption. "USD 50K."