George Conway, the lawyer who became an online celebrity with his anti-Trump tweeting, will headline a fundraiser for President Biden in D.C. on April 24, Democratic sources tell Axios.

Why it matters: This is Conway's first big pro-Biden event.

Driving the news: Conway, who's divorced from former Trump aide Kellyanne Conway, wrote a check for $929,600 — the max you can give to the Biden Victory Fund. The minimum gift for the event is $500.

• The lead hosts are Melissa Moss, a strategic consultant who's very visible around Washington, and her husband, Jonathan Silver. Susan Brophy helped organize.

Go deeper: Biden's colossal cash advantage