Fans and friends of the actor shared congratulatory messages to the couple for their relationship milestone.

Lowe and Berkoff have two children together, Matthew Lowe, 30, and John Owen Lowe, 28.

\"PHOTO:
Robyn Beck/AFP via Getty Images
PHOTO: Matthew Edward Lowe, John Owen Lowe, Rob Lowe and make-up artist Sheryl Berkoff arrive for the "Unstable" series premiere at the Tudum Theatre in Los Angeles, March 23, 2023.
>

Rob and John Owen Lowe recently starred together in the Netflix series \"Unstable,\" which the \"St. Elmo's Fire\" star and his son co-created and executive produced.

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