Hillary Clinton's name will be symbolically put forward as a presidential candidate at the Democratic convention later this month even though she narrowly lost the battle for the nomination to Barack Obama.
In a joint statement, the two campaigns said on Thursday that Senator Obama encouraged Senator Clinton's name to be placed in nomination as a show of unity.
The statement also noted the two senators "are looking forward to a convention unified behind Barack Obama as the party's nominee."
The party convention begins in Denver on 25 August.
Senator Clinton is due to address the convention in prime-time on Tuesday, 26 August. Her husband, former president Bill Clinton, will speak the next night, Wednesday, when the ballot takes place.
A Clinton aide said there will be a roll call vote for the nomination. Such a procedure would allow supporters to vote for her on the convention floor, even though they would not have enough votes to deny Senator Obama the nomination.