UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Notice of Effectiveness
Effectiveness Date: August 15, 2008
Accession Number: 0000950137-08-009026
Submission Type: 485APOS
CIK: 0000826732
Company Name: CALAMOS INVESTMENT TRUST/IL
File Number: 033-19228
REFERENCED SERIES/CLASSES (CONTRACTS)
Series ID
Class/Contract Name
S000022429 Calamos Evolving World Growth Fund
C000064540 Class R
C000064541 Class A
C000064542 Class B
C000064543 Class C
C000064544 Class I