Democratic Assemblyman Todd Kaminsky has formed a campaign committee to run for the Senate seat vacated by Republican former Majority Leader Dean Skelos.

Kaminsky formed the committee on Jan. 6, according to a filing posted by the state Board of Elections.

He has not officially launched a campaign, but has been critical of Skelos, who was forced out of office last month following his conviction on corruption charges, after the Nassau County Republican filed for his pension.

Kaminsky was endorsed by Nassau County Democrats last week.

Kaminsky is a former federal prosecutor and a freshman state lawmaker, and has been considered a raising star for Democrats in Albany, helping write ethics and anti-corruption legislation in the wake of the arrest of former Assembly Speaker Sheldon Silver.

A special election is yet to be called for the Skelos seat, but it would likely be held on April 19, the same day as the state’s presidential primary.

Still, sources have told NY1 that a special election for the seat, along with the district formerly led by Silver could be held off because the Board of Elections would have trouble handling it.

The race in the Democratic-leaning district could be key for Senate Republicans, who hold a narrow majority in the chamber.

Republican Assemblyman Brian Curran is among the GOP candidates considering a run for state Senate.