Michael and Holly have also recently gotten engaged, according to In Touch Weekly, which reported the two couples are shopping a reality show to networks.
"They're pitching their show all around town," an insider told the magazine. "They want a double wedding and are hoping that it all gets aired on TV."
Stephen had recently denied he and DeAnna had gotten engaged.
"We are not engaged. Don't have a ring yet, so it's hard to propose," he told People at the July 17 wrap party for Bachelor Pad, the new The Bachelor franchise spinoff that premiered on ABC last night.
However his brother Michael had said the brothers weren't likely to remain bachelors much longer.
"[Stephen and I] are honestly so in love and so happy," he told People. "Rings are coming!"
Holly had also told People she expected Michael to propose soon and admitted the couples were considering a double wedding.
"We've already talked about it, all four of us," she said. "If we were to do it, we'd have two different ceremonies and one huge reception."