The "Style" singer cuddled up with her godson -- King's youngest son, Leo Thames -- as he celebrated his six-month birthday.
Swift posted two photos on Instagram on Saturday, showing off the adorable tot.
"LT is 6 months old today!! @jaime_king," she captioned a sweet post of herself and Leo. "Pretty wild that 6 months ago, LT wasn't even born yet and now he chews on my fingers."
King's husband, director Kyle Newman, shared the same photo on Twitter, adding, "Godson & Godmomma. Happy 6th months to #LeoThames. So kind of you to let him nibble on your finger @taylorswift."
In Swift's other post, she and King can be seen adorably snuggle up to baby Leo, who luckily isn't gnawing on any of her appendeges.
"LT is 6 months old today!! @jaime_king," Swift wrote.
King -- who's also mom to 2-year-old James Knight, her oldest son with Newman -- shared a couple of photos from the day as well, including one of Swift and Leo having a special moment together.
"What love looks like... LT and TS ♥️," she captioned the sweet snap.
Swift has been open about how much of an impact Leo has made
on her life since she was named his godmother. "I was holding this little baby the other night, and I was just thinking differently," Swift told her audience during a concert in August. "When you're holding onto something that's so innocent and so perfect and has no idea what's coming for it with the world. The world is going to throw so many things at you as we grow up."
At the same show, she dedicated her 2010 song, "Never Grow Up," to Leo. Watch the sweet moment in the video below.