CHICAGO (CBS) — A Chicago billionaire is answering Warren Buffett’s collect call to give away his money.

Morningstar chief executive officer Joe Mansueto has agreed to give away half his wealth to charity.

Buffett first asked Mansueto back in August. After mulling it over throughout the fall, Mansueto finally decided to go ahead.

He is the first Chicago billionaire to sign Buffett’s pledge. A total of 57 billionaires have signed up, the Chicago Tribune reported.

Buffett and Microsoft founder Bill Gates have are urging the world’s wealthiest people to join Giving Pledge and step up their charitable donations.

Among the 16 others who joined the list Wednesday were Facebook founder Mark Zuckerberg , junk bond pioneer Michael Milken and AOL co-founder Steve Case. The Giving Pledge list also includes the likes of New York Mayor Michael Bloomberg, CNN founder Ted Turner and film director George Lucas.

(TM and © Copyright 2010 CBS Radio Inc. and its relevant subsidiaries. CBS Radio and EYE Logo TM and Copyright 2010 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed. The Associated Press contributed to this report.)

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