Kelly Osbourne Celebrates 'Magical Bond' With Intimate Snapshot of Son Sidney

Kelly Osbourne

Kelly Osbourne is marking her baby boy's first trip around the sun in the cutest way.

The TV personality and mother of one took to Instagram this week to celebrate the birthday of her newly-minted one-year-old son, Sidney—and the photo is almost too adorable to handle.

Osbourne, who shares the infant with boyfriend Sid Wilson, took her son's milestone birthday as an opportunity to share what a "magical" year it's been since the little one came into her life.

Sharing a heartwarming snap of baby Sidney smiling from ear to ear during bath time, the 39-year-old wrote to her son, "To watch you grow, learn and become a little man is the greatest joy I have ever felt."

"The most magical bond I have ever experienced is the bond I feel with you," Osbourne continued while going on to say that having her baby boy is what taught her the true meaning of love.

"Before you love was just a word that I thought I understood. NOW I truly understand what love is," the doting mom wrote. "I am forever indebted to you for teaching me the beauty meaning and truth of love. What more can I say other than I love you."

"Happy birthday sweet price [sic]," she concluded. "We made it on our first trip around the sun together. ??????????????????????????."

The addition of Sidney to the family made Sharon and Ozzy Osbourne grandparents of five little ones, following the four children welcomed by their son Jack Osbourne: 11-year-old Pearl, 7-year-old Andy, and 5-year-old Minnie, whom he shares with ex-wife, Lisa Stelly, as well as 16-month-old Maple, whom Jack welcomed with wife Aree Gearhart.

Next: Kelly Osbourne Gets Candid About Her Post-Pregnancy Weight Loss: 'Went a Little Too Far'