Ja Rule just went from spitting bars to spitting tears (maybe) — ’cause his baby girl Brittney Atkins just said “I do,” and Papa Rule was front and center for the big moment!

Brittney’s all grown up … and, social media clips from the wedding show the rapper trading the recording studio for a chance to witness true love instead of his more aggressive “Thug Lovin’.”

Hit the play button, folks … Ja Rule walks slowly with his daughter — careful not to step on her large train, ’cause Britt might go full Murder Inc. on him if he signs her bright white ensemble with a shoeprint.

No rap battles against old rival Eminem here, though … he gave a heartfelt speech instead — though he admitted he decided to off-the-cuff the speech instead of preparing one.

JR discussed his daughter’s wedding with Page Six just a couple months ago … admitting he wasn’t prepared to put on a full concert for her — but, that didn’t mean he wasn’t considering a surprise or two for Brittney.

Ja Rule’s a baller — now a bawler — and, it doesn’t seem like he broke down in public … but, ya never know what could’ve gone down in the privacy of his hotel room.