Watch live as Antony Blinken hosts David Cameron in Washington, DC on Thursday, 7 December.
The pair are conducting a press conference at the State Department as part of Lord Cameron's first visit to the US since becoming foreign secretary.
It comes after the former UK prime minister met US House Speaker Mike Johnson.
According to the UK Foreign, Commonwealth and Development Office (FCDO), Lord Cameron's visit is intended to "reaffirm the strength of the UK-US relationship and support for Ukraine."
Lord Cameron is to announce £37m of humanitarian funding for Ukraine, and discuss getting humanitarian aid to those affected by the conflict in Gaza, a statement said.
He has urged US politicians to approve a fresh package of military aid for Ukraine, after Joe Biden pleaded with Republicans for a fresh infusion of funding.