REFILE-UPDATE 1-German Conservative boss to succeed von der Leyen as minister

(Corrects to Wednesday from Tuesday in second paragraph)

BERLIN, July 16 (Reuters) - Annegret Kramp-Karrenbauer, a close ally of German Chancellor Angela Merkel and head of her Christian Democrat party, will succeed Ursula von der Leyen as defence minister, government spokesman Steffen Seibert told Reuters.

Von der Leyen, who was confirmed on Tuesday by the European Parliament as the next head of the European Union's executive commission, steps down from her German role on Wednesday.

The choice of Kramp-Karrenbauer, a follower of Merkel's centrist politics, came as a surprise to many in Berlin, where many had expected Jens Spahn, the arch-conservative health minister, to take the defence job.

But Kramp-Karrenbauer, widely seen as the long-serving chancellor's favoured candidate to succeed her, currently has no government role, a reason critics have given in the past to oppose her possible rise to the chancellorship.

(Reporting by Andreas Rinke; Writing by Thomas Escritt; Editing by Kevin Liffey and Peter Cooney)