Maryam Kaviani (also transcribed Maryam Kavyani) is referenced in entertainment media as an actress. For example, her name appears in discussion of film/TV series under the spelling “Maryam Kavyani”. The precise details of her career (e.g., birth date, full filmography, education) are not readily found in mainstream English-language sources. Media coverage has shown photographs of her at social events and in marriage announcements. However, you asked about “ex-wife”. I did not find credible sources confirming a divorce or separation publicly reported for the pair.
Some Persian entertainment-media articles claim she “talks about her failed marriage” with him. Several Persian entertainment sites published photo galleries of Maryam Kaviani’s marriage and social appearances. One article on claims Maryam Kaviani has spoken publicly about a “failed marriage” with Mehmanparast — but I found no reliable independent source verifying the statements or providing details.