Christopher Schwarzenegger is showing off his slim figure and new girlfriend.

The 28-year-old enjoyed a family day at a pumpkin patch in Brentwood, Calif., Monday with his sister Katherine Schwarzenegger, her husband, Chris Pratt, and the mystery blonde.

In photos obtained by Page Six, Christopher and his significant other shared a kiss and walked side by side while carrying pumpkins.

The two couples were also joined by Katherine and Pratt’s daughters, Lyla and Eloise .

Christopher flaunted his biceps in a white tank top, which he paired with dark green cargo pants and sneakers.

His girlfriend also kept it casual for the family outing, wearing an off-the-shoulder University of Michigan T-shirt — Christopher’s alma mater — and jeans.

Christopher’s girlfriend also joined his family f

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