X0101 EFFECT 33 LIVE 2006-05-31 13:00:00

N-1A

0001353176 AMERICAN CENTURY GROWTH FUNDS, INC. 333-132114 S000012177 LEGACY FOCUSED LARGE CAP FUND C000033214 INVESTOR CLASS S000012177 LEGACY FOCUSED LARGE CAP FUND C000033215 INSTITUTIONAL CLASS S000012177 LEGACY FOCUSED LARGE CAP FUND C000033216 ADVISOR CLASS S000012177 LEGACY FOCUSED LARGE CAP FUND C000033217 R CLASS S000012178 LEGACY LARGE CAP FUND C000033218 INVESTOR CLASS S000012178 LEGACY LARGE CAP FUND C000033219 INSTITUTIONAL CLASS S000012178 LEGACY LARGE CAP FUND C000033220 ADVISOR CLASS S000012178 LEGACY LARGE CAP FUND C000033221 R CLASS S000012179 LEGACY MULTI CAP FUND C000033222 INSTITUTIONAL CLASS S000012179 LEGACY MULTI CAP FUND C000033223 ADVISOR CLASS S000012179 LEGACY MULTI CAP FUND C000033224 R CLASS S000012179 LEGACY MULTI CAP FUND C000033225 INVESTOR CLASS