ABC News anchor Dan Harris, who is replacing Bill Weir as a co-anchor of "Nightline." (Lou Rocco / Associated Press )
Bill Weir, the co-host of "Nightline," is leaving for "another opportunity in the news business," said ABC News' president Ben Sherwood on Friday.
He did not say where Weir is going.
Weir, who has co-hosted "Nightline" since 2010, said on his Twitter account that he would be saying "goodbye" on Friday night's program.
ON LOCATION: Where the cameras roll
Sherwood said that "Good Morning America" co-anchor Dan Harris will take over Weir's "Nightline" hosting duties, effective immediately.
Harris, who will continue in his post at "Good Morning America," joins Cynthia McFadden and Dan Abrams at the helm of the late-night news program.
Weir helped launch "GMA's" weekend edition in 2004 and was named co-anchor of "Nightline" in 2010.
"Bill’s style is singular; his voice unique; and we will miss him and, yes, his turkey frying safety tips," Sherwood said in a statement."
"Nightline" comes on at 12:35 a.m.
[For the record: And earlier version of this post said "Nightline" airs at 12:35 p.m. It actually comes on at 12:35 a.m.]
RealD reaches deal to double its 3-D screen count in Russia
Entertainment execs ask lawmakers to bolster state film tax credit
Univision, Time Warner Cable strike new distribution deal
Follow on Twitter: @rfaughnder
PHOTOS: Highest-paid media executives of 2012
ON LOCATION: People and places behind what's onscreen
PHOTOS: Celebrity production companies