Can toy story figures be mixed with disney princess figures?

Quick Answer
No official information confirms that Toy Story figures can be mixed with Disney Princess figures; they are produced as separate lines.
Explanation
Toy Story is a Pixar franchise and its figures are manufactured under the Pixar and Disney brand, whereas Disney Princess figures belong to a distinct line that includes characters such as Jasmine from Aladdin. Neither Pixar nor Disney has issued any statements or product documentation indicating that figures from these two lines are designed for compatibility or cross-play. Collectors typically keep lines separate because the scale, articulation, and packaging differ. While it is physically possible to place a Toy Story figure next to a Disney Princess figure in a display, there is no evidence that the figures are intended to interact or play together.