“OctoMel” launched a “crazed rant” in the middle of worship services at his church last Sunday.

The devout Catholic — and soon to be father of eight — attended a service at the Holy Family Chapel in Agoura Hills on Sunday and reportedly blasted fellow worshippers for gossiping about his private life –following his split from wife Robyn and the subsequent pregnancy of a Russian singer. In April, Mel and his wife of 28 years, Robyn Gibson, filed for divorce. They have seven children together. Mel recently confirmed his new girlfriend, Oksana Grigorieva, is pregnant with their first child.

A source told gossip website Radar Online: “Mel has completely lost it. His holier than thou world is falling apart and it seems Mel hasn’t been practicing what he preaches.”

“It was a crazed rant. He paced back and forth, furiously telling the congregation including two priests and a visiting bishop, that he would not stand by and be judged and scrutinized.”

According to the source, Mel has allegedly threatened to close the church if he continues to suspect that members of the congregation are talking about him.

“Mel approached the altar and went off. He tried to intimidate the parishioners by staring at everyone with his angry eyes. Mel even threatened to shut down the church if people kept gossiping about him.”

The insider adds, “The bottom line is that if Mel hadn’t gotten his Russian girlfriend pregnant while he was still married, there wouldn’t be much to gossip about.”