Vance called attacks on his famous sibling “bulls–t” in one of two heartfelt social media posts Tuesday.

“If you think Ellen would knowingly allow bullying or racism on her show, you don’t know my sister,” her big brother, 65, wrote in a supportive Twitter post. “She has been and continues to be a bright light in a dark world. She’s one of the kindest, most generous people you’ll ever meet. And one of the funniest.”

Ellen, 62, has recently faced accusations of behind-the-scenes sexual misconduct, racism and more on the part of the show’s staff. The allegations fly in the public face of the longtime show host, who encourages viewers to “be kind.”

On Tuesday, Vance also took to Facebook with an impassioned affirmation that he stands by his sister.

“Ok, I need to say something. My sister is being viciously attacked. And let me assure you – it is all bulls-t,” he wrote. “I put up a simple statement yesterday that said ‘I stand by Ellen.’ Only a handful of my Facebook ‘friends’ responded to it. If you don’t support Ellen, then you don’t support me, so please unfriend me. I’m sick and tired of my sister being attacked. She always has — and always will — stand against bullying of any kind. She’s a smart, strong woman who has made a positive difference in the world. And to my friends who did respond with support for Ellen and my family, thank you so much. It means a lot.”

Several celebrities — including Ellen’s wife, Portia de Rossi, and comedian Kevin Hart — have come to Ellen’s defense, as stars like “Everybody Loves Raymond” alum Brad Garrett and “Back to the Future” actress Lea Thompson added fuel to the anti-Ellen fire.

Rumors also recently surfaced that Ellen was ready to depart her show, with some speculating that CBS late-night host James Corden could take over. However, on Monday, the show’s staff returned to work on the upcoming 18th season, and an insider told The Post that “Ellen isn’t quitting” and added that Corden “has never once been spoken to or considered as a replacement for anything.”

When asked in July about cancellation rumors by The Post, DeGeneres’ production company representatives said, “Telepictures can confirm it’s untrue.”

On July 30, DeGeneres addressed the workplace allegations in a memo to staff, saying she was “sorry” and vowing to make unspecified changes.