Trump admin updates: Trump teases 'big day' at White House

President Donald Trump said he believed Russian President Vladimir Putin and Ukrainian President Volodymyr Zelenskyy want to make peace.

"We're going to see what happens. And, I think President Putin will make peace. I think President Zelensky will make peace. We'll see if they can get along and if they can, it'll be great," Trump said in the Oval Office.

Zelenskyy on Wednesday warned Trump and European leaders that Putin is "bluffing."

"I told my colleagues, the U.S. president and our European friends, that Putin definitely does not want peace. He wants the occupation of our country. And we all really understand that. Putin will not be able to deceive anyone. We need further pressure for peace. Not only American, but also European sanctions," Zelenskyy said.

President Donald Trump discussed his expectations for Friday's summit in Alaska with Russian President Vladimir Putin.

"We're going to see what happens with that meeting," Trump said in the Oval Office on Thursday. "We have a big meeting, and it's going to be, I think, very important for Russia. And it's going to be very important for us and important for us only in that we're going to save a lot of lives."

Trump said he believed he'd have a "good" conversation with Putin, but that the more significant development would be a trilateral meeting between the U.S., Ukraine and Russia.

"We have a meeting with President Putin tomorrow. I think it's going to be a good meeting, but the more important meeting will be the second meeting that we're having. We're going to have a meeting with President Putin, President Zelenskyy, myself and maybe we'll bring some of the European leaders, maybe not," Trump said.

President Donald Trump, joining "The Brian Kilmeade Show" on Thursday, indicated there’s a 25% chance that his meeting with Russian President Vladimir Putin won’t be successful in achieving his goal of securing progress toward a ceasefire.

“This meeting sets up the second meeting, but there is a 25% chance that this meeting will not be a successful meeting, in which case I will run the country and we have made America great again," Trump said.

The president has said he wants the next meeting to include Ukrainian President Volodymyr Zelenskyy.

Trump even floated that teams stay in Alaska for the second meeting, given the logistics of the event.

"I don't know where we're going to have the second meeting, but we have an idea of three different locations, and will be including the possibility, because it would be by far the easiest of staying in Alaska. You know, we have, we have big flights of and he has the same thing," Trump said.

-ABC News' Kelsey Walsh and Michelle Stoddart

White House press secretary Karoline Leavitt said the "plan" on Friday is for President Donald Trump and Russia's Vladimir Putin to hold a joint press conference after their meeting.

Leavitt spoke at length on "Fox and Friends" on Thursday morning about Trump's upcoming trip to Alaska. Leavitt declined to get into specifics about Trump's strategy for negotiations ahead of the meeting, but did reiterate his determination to secure a peace deal.

"Tomorrow, bright and early, he will be departing the White House for our joint military base in Anchorage, Alaska, where he will engage in a one-on-one meeting with President Putin, which will be followed by a bilateral lunch with a respective delegation from both countries, and then a press conference," Leavitt said.

Leavitt indicated that there is a plan for a joint press conference after the meeting with both Trump and Putin taking questions.

"Will this be a joint press conference where both sides get to ask Vladimir Putin and Donald Trump?" the reporter asked.

"Yes, that is the plan," Leavitt confirmed.

-ABC News' Michelle Stoddart and Kelsey Walsh