The Rolling Stones frontman, 72, shared a stunning sunset photo of the American stylist and fashion designer on Twitter and Instagram Thursday. April 28 marked Scott's 52nd birthday.
"Remembering L'Wren on her birthday," he captioned the photo.
Scott, who dated Jagger for 12 years, was found dead inside her New York City apartment on March 17. The city medical examiner confirmed the cause of death as suicide.
"I'm still struggling to understand how my lover and best friend could end her life in this tragic way," Jagger wrote on Facebook, one day following Scott's death. "We spent many wonderful years together and had made a great life for ourselves. I will never forget her."
Although this time of year is a difficult for Jagger, the father of seven celebrated a big milestone. His son James got married to Anoushka Sharma on Saturday Oxfordshire, England. James' mother and Jagger's ex-wife Jerry Hall was also in attendance with new husband Rupert Murdoch.