<?xml version="1.0" encoding="UTF-8"?>
<edgarSubmission xmlns:com="http://www.sec.gov/edgar/common" xmlns="http://www.sec.gov/edgar/npx">
  <headerData>
    <submissionType>N-PX</submissionType>
    <filerInfo>
      <registrantType>RMIC</registrantType>
      <liveTestFlag>LIVE</liveTestFlag>
      <filer>
        <issuerCredentials>
          <cik>0001079575</cik>
          <ccc>XXXXXXXX</ccc>
        </issuerCredentials>
      </filer>
      <investmentCompanyType>N-1A</investmentCompanyType>
      <periodOfReport>06/30/2026</periodOfReport>
    </filerInfo>
    <seriesClass>
      <reportSeriesClass>
        <rptSeriesClassInfo>
          <seriesId>S000006427</seriesId>
          <classInfo>
            <classId>C000017621</classId>
          </classInfo>
        </rptSeriesClassInfo>
      </reportSeriesClass>
    </seriesClass>
  </headerData>
  <formData>
    <coverPage>
      <yearOrQuarter>YEAR</yearOrQuarter>
      <reportCalendarYear>2026</reportCalendarYear>
      <reportingPerson>
        <name>CALAMOS ADVISORS TRUST/IL</name>
        <phoneNumber>(630) 245-7200</phoneNumber>
        <address>
          <com:street1>2020 Calamos Court</com:street1>
          <com:city>Naperville</com:city>
          <com:stateOrCountry>IL</com:stateOrCountry>
          <com:zipCode>60563-2787</com:zipCode>
        </address>
      </reportingPerson>
      <agentForService>
        <name>Erik Ojala</name>
        <address>
          <com:street1>Calamos Advisors LLC</com:street1>
          <com:street2>2020 Calamos Court</com:street2>
          <com:city>Naperville</com:city>
          <com:stateOrCountry>IL</com:stateOrCountry>
          <com:zipCode>60563-2787</com:zipCode>
        </address>
      </agentForService>
      <reportInfo>
        <reportType>FUND VOTING REPORT</reportType>
      </reportInfo>
      <fileNumber>811-09237</fileNumber>
      <explanatoryInformation>
        <explanatoryChoice>N</explanatoryChoice>
      </explanatoryInformation>
    </coverPage>
    <summaryPage>
      <otherIncludedManagersCount>0</otherIncludedManagersCount>
    </summaryPage>
    <seriesPage>
      <seriesCount>1</seriesCount>
      <seriesDetails>
        <seriesReports>
          <idOfSeries>S000006427</idOfSeries>
          <nameOfSeries>Calamos Growth &amp; Income Portfolio</nameOfSeries>
          <leiOfSeries>549300VT8ABWC9Z27Y74</leiOfSeries>
        </seriesReports>
      </seriesDetails>
    </seriesPage>
    <signaturePage>
      <reportingPerson>CALAMOS ADVISORS TRUST/IL</reportingPerson>
      <txSignature>Kathleen McCarthy</txSignature>
      <txPrintedSignature>Kathleen McCarthy</txPrintedSignature>
      <txTitle>VP, Investment Operations</txTitle>
      <txAsOfDate>08/25/2026</txAsOfDate>
    </signaturePage>
  </formData>
</edgarSubmission>
