Born on July 25, 2011, Arthur Saint Bleick is Blair's only child, whom she shares with former boyfriend and fashion designer Jason Bleick. Whether it be on social media or in interviews, the Cruel Intentions actress has always been very outspoken about Arthur and their relationship. Some may even remember the intimate moment Blair shared of Arthur shaving her head following her MS diagnosis.
In a sea of changes, the 48-year-old mom knew MS would bring its challenges; but, she didn't expect her son to adapt so wonderfully. "I had no idea Arthur was proud of that," she told People, referring to her visits to Arthur's school and with his friends. "I thought 'I'm probably an embarrassment,' but to know I'm not was one of my proudest moments." Blair has taken to Instagram many times vocalizing how proud and happy she is of Arthur's courage, bravery, and heart.