Bill Clinton will speak at the Democratic convention later this month.

(CNN) — Multiple sources tell CNN that former President Bill Clinton will have a speaking role at the Democratic Convention, scheduled to take place in Denver later this month.

The sources say he will speak Wednesday night, the night of the vice presidential nominee’s speech. Barack Obama will officially become the presidential nominee the next night.

Candy Crowley also reports Obama and Bill Clinton spoke today.

News of the former president's role leaked out as reports of tension between the Clinton and Obama camps over fundraising and convention planning issues, and the release of a YouTube clip showing Clinton telling supporters they should develop some sort of “strategy” to make sure their positions were represented at the Denver convention.

Obama said Thursday that the controversy over whether the New York senator's delegates would be able to vote for her at the Democratic convention was a media creation.

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