Actor George Clooney's ex-girlfriend Elisabetta Canalis is pleased he has found happiness with Amal Alamuddin.

The 35-year-old dated the Hollywood star for 18 months until their split in 2011, and she is "happy" for her ex-boyfriend, who is getting married to Alamuddin, reports femalefirst.co.uk.

"I am happy for him, but I am thinking only of my happiness," she said.

The Italian actress is set to tie the knot with Brian Perri in September - the same month Clooney is getting hitched. But she says it's just a coincidence.

"I chose the date some time ago and September is the most beautiful time -- for those who do not know Sardinia (an island) -- to appreciate it. Otherwise, I would have had to wait a year," she said.