In latest 'Grey's Anatomy' news and rumors, an actress from the popular FX series 'The Americans' will apparently appear in the upcoming Season 11.

"Had fun @GreysABC today ;) #GreysAnatomy," wrote 'The Americans' star Annet Mahendru via Twitter on August 29.

In addition, TVLine also confirmed that the 'Grey's Anatomy' appearance by the actress. Mahendu is best known for her role as Nina Sergeevna Krylova on the popular television drama which takes place during the Cold War period between the USA and Russia (then known as the USSR) in the 1980s.

Mahendru's 'The Americans' co-stars includes 'Felicity' actress Keri Russell (Elizabeth Jennings aka Nadezhda), Matthew Rhys (Philip Jennings aka Mischa), Susan Misner (Sandra Beeman) and Noah Emmerich (Stan Beeman) to name a few.

Mahendru's role in 'Grey's Anatomy' has not been revealed as of yet, but she is expected to be a guest star in a future episode of the forthcoming season.

In other 'Grey's Anatomy' Season 11 news, series creator Shonda Rhimes revealed what fans can expect to see regarding Dr. Meredith Grey's (Ellen Pompeo) relationship with Dr. Derek Shepherd aka 'McDreamy' (Patrick Dempsey) when the series returns later this month.

"I'm not going to say that Meredith and Derek are never going to break up," said Rhimes to TVLine, "I'm not going to say that simply because we're writing a story and we're on this long, long journey. I've learned never to say absolutes about anything anymore. People always say, 'Seven seasons ago you said... ' Well, I didn't think we'd still be here."

Rhimes furthered expressed her thoughts regarding the two popular main characters in the long running series.

"I was not interested in telling the story of a really good marriage that breaks up because of this," said Rhimes, "There's work involved in keeping an amazing marriage amazing, and I would personally like to watch what happens when [they try] to fight through it."

'Grey's Anatomy' returns for and impressive 11^th season on the ABC network on Sept. 25 at 8pm EST.