Louis Tomlinson 1D Baby's First Outing

1/27/2016 8:41 AM PST BY TMZ STAFF

0127_Louis_Tomlinson_baby_brianna_family_photos_launch2Here ya go One Direction fans -- Louis Tomlinson taking the stage for the first time ... as a hands-on dad!

Louis loaded up his newborn son into an SUV, along with baby mama Briana Jungwirth. Looks like daddy Louis had first shift on car seat duty as they headed to the hospital for a checkup.

Their kid's about 6 days old ... but Louis and Briana still haven't announced a name. Tuesday's outing was the first time the new parents have been seen together in months.

BTW ... props to Briana for the bounce back!