Ashlee Simpson hasn't even been dating Evan Ross for a year yet, but marriage is already on the mind for the couple.

Diana Ross' 25-year-old son told omg! Insider of his relationship with the 90210 star and "Pieces of Me" singer, "It's amazing, I'm so in love and we've got amazing things going on. And we inspire each other. So it's cool."

When pried about where he sees the relationship going, Ross revealed, "Yeah, she's the one," adding that he can definitely see a wedding in the future.

"Evan and Ashlee have been friends for a really long time, probably 10 years," a source close to the couple told US Weekly back in July. Another source said, "They have a long bond. They already know each other really well."

People reports that Ross is also building a relationship with Simpson's 5-year-old son Bronx Mowgli, who she had with ex-husband Pete Wentz.

Ross will star in the upcoming The Hunger Games: Mockingjay parts 1 and 2 films.

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