Denise Richards Shares Sunny Photos For Daughter Lola's 18th Birthday

Life is going by in the blink of an eye for Denise Richards, who just celebrated her middle daughter's 18th birthday.

Lola Sheen rang in the big milestone b-day on Thursday, June 1, and she appears to be celebrating the momentous occasion from a tropical beach location.

Richards, who can't seem to wrap her head around her girls growing up, took to Instagram to pen Lola a special message alongside an array of sun-filled snaps.

"Happy 18th Birthday my Lola girl! I can’t believe you’re 18… it went by so fast," the Real Housewives of Beverly Hills star wrote in her caption. "I'm so proud of you & you are amazing & beautiful & I love your heart so much."

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"You’re beginning a new chapter & the best is yet to come. I love you so much & so happy you’re celebrating at your favorite place ever??. I love you Lo… Happy Birthday ??," the doting mama added.

Lola responded to her mom's sweet message with an equally wholesome comment, which read, "I love you so much mom you mean everything to me??????."

Richards, a mom of three, shares daughters Sami, 19, and Lola, freshly 18, with ex-husband Charlie Sheen. She also adopted a third child, her youngest daughter, Eloise, who turned 12 last month.

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Richards, who is now married to her second husband, Aaron Phypers, shared another Instagram post for Eloise just a few weeks ago, lovingly calling the pre-teen "our beautiful Eloise."

"You’re an angel & teach us so much," she wrote at the time. "We love you so much. Happy Birthday girlie!!!! ??????"

Next: Denise Richards Shines a Light on Her 'Gorgeous' Daughter Sami Sheen