The actress also sent her husband, Josh Kelley, a sweet message on social media.
Smith confirmed he was in a relationship in October.
The sweet couple 'can't wait to spend forever together.'
Bristol also took to Instagram to congratulate her little sister.
This is hair news, not engagement news, people!
The couple also dished on whether kids might be in their future.
Eight years of wedded bliss!
The couple was photographed at the Van Nuys airport in California on Saturday.
The 'Empire' star reveals she's been dating the athlete for two years.
The 20-year-old singer gushed over her professional soccer player beau while speaking with ET at her iHeartRadio Mi Musica show presented by JCPenney. The concert will be broadcast across select mainstream Spanish stations and video stream on iHeartRadio.
Jamie has never publicly confirmed that he's dating Katie, but there's no doubt now after the way they celebrated his birthday Wednesday night.
A source confirms to ET that the actress and musician have been dating for at least two months.
The couple couldn't appear stronger after the rapper's infidelity admission.
The "Jar of Hearts" singer tied the knot with her TV personality beau.
