Sean and Catherine Lowe Celebrate Son Samuel's First Birthday -- See the Sweet Pics!

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Sean and Catherine Lowe’s son Samuel turned one on Sunday and the little cutie celebrated in style!

The couple, who met and got engaged on season 17 of The Bachelor before tying the knot in January 2014, took to social media to share sweet pics and messages on their baby boy's big day.

“Happy birthday Samuel!” Sean captioned a smiley pic of his son decked out in Minions gear. “You don't have Instagram so you won't see this, and even if you did you can't read, but this is what parents do to show their love I guess. Here's to you playing with the plastic bags instead of toys today!”

EXCLUSIVE: Sean and Catherine Lowe on Why They're the Only 'Bachelor' Couple to Get (and Stay) Married

Later in the day, Catherine shared a pic of Samuel enjoying his cake, which she noted was a “smashing” success!

WATCH: 'Bachelor' Star Sean Lowe Shares Super Sweet Birthday Message for Wife Catherine

Back in April, the couple spoke to ET’s Lauren Zima about expanding their family, sharing that they have “a heart for adoption.”

"I'm the person that wants a soccer team as a family and have a compound and everyone sleeping together in bunk beds and all that stuff. So yeah, there will definitely be more… I think five. Three natural and two adopted. That's my vision," Catherine said at the time. "We're probably going to start trying soon."

See more in the video below!

EXCLUSIVE: Sean and Catherine Lowe Open Up About Parenting & Wanting More Kids: We 'Have a Heart for Adoption'