Katelyn Sweet is the girlfriend of up-and-coming NASCAR driver Kyle Larson. Katelyn, the sister of NASCAR XFinity Series driver Brad Sweet, gave birth to the couple's first child, a boy Owen, in December. Larson is still looking for his first Sprint Cup victory, but has 19 Top 10s in 45 career starts. He's won twice in the XFinity Series and once in the Trucks Series. Katelyn and new baby Owen have been staples at the track this race season. You can follow her Instagram @katelyn_sweet and on Twitter @Katelyn_Sweet. Click through this gallery for her best Instagram photos.