United Kingdom, Sept. 13 -- Heidi Klum has marked her son Henry's 20th birthday by sharing a series of personal photographs and tributes on Instagram to her boy.

The supermodel, 52, posted images of Henry - who she had with her singer ex-husband Seal - throughout the years, from childhood snapshots to more recent pictures to mark him turning 20 on Friday (12.09.25.)

She captioned her carousel of snaps: "We love you all so very much (red heart emoji) HENRY (red heart emoji.)"

The photos included images of Heidi cuddling Henry as a child, a picture of him smiling as a baby, and more recent shots of him playing a video game and looking into the camera.

Henry is one of four children Heidi shares with her former husband Seal, 62.

Their ot...