London
(ANI):
It
seems
that
Sienna
Miller's
taxing
schedule
on
the
set
of
her
latest
film,
GI
Joe
is
taking
its
toll
on
her.
According
to
friends,
the
actress
is
"exhausted" by
the
physical
demands
of
the
military
action-thriller.
The
British
beauty,
who
has
been
filming
in
the
Czech
Republic
along
with
co-stars
Christopher
Eccleston
and
Dennis
Quaid,
has
had
to
undergo
boxing
lessons
and
weight-lifting
sessions.
However,
boyfriend
Rhys
Ifans
has
been
constantly
ringing
her
up
from
the
set
of
his
own
film,
The
Boat
That
Rocked,
in
Dorset.
"Rhys
is
worried
how
tired
she
is.
She
is
really
giving
her
all
to
this
film
which
is
tipped
to
be
one
of
the
biggest
of
2009," the
Daily
Express
quoted
a
friend,
as
saying.
"But
Rhys's
voice
helps
her
while
she's
struggling
with
the
demands.
He
spends
nights
on
the
phone
to
her
trying
to
soothe
her
to
sleep.
His
voice
relaxes
her
and
he
tries
to
take
her
through
a
meditation
routine
so
she
can
empty
her
mind,"
the
friend
added.