Former Democratic presidential candidate Martin O'Malley didn't miss out on the action at Thursday's debate.

The former Maryland governor chirped in during a tense moment between Hillary Clinton and Bernie Sanders at the CNN debate, siding with the Vermont senator that the former secretary of state ought to share the transcripts of her speeches to big banks.

"Said this in 2012 about @MittRomney's tax returns, I'll say it today: @HillaryClinton should release the Wall Street transcripts #DemDebate," tweeted O'Malley, the most recent Democrat to jump out of the race February 1.

Said this in 2012 about @MittRomney's tax returns, I'll say it today: @HillaryClinton should release the Wall Street transcripts #DemDebate — Martin O'Malley (@MartinOMalley) April 15, 2016

Clinton was booed by audience members when she repeatedly answered that she would not release that information to the public. Nevertheless, the Democratic front-runner sought to assure viewers there was "absolutely" nothing to be concerned about.

Instead, Clinton redirected the conversation to an attack on her rival.

"There are certain expectations when you run for president. This is a new one ... but I will tell you this, there is a longstanding expectation that everybody running release their tax returns," Clinton said. "Set the same standard on tax returns. Everybody does it — and then we move forward."

Sanders, said his wife, Jane, has been busy on the campaign trail and has not filed the family's taxes yet, but he promised his 2014 returns would be released Friday.